A coin released at rest from the top of a tower hits the ground after falling 1.5 s. What is the speed of the coin as it hits the ground? (Disregard air resistance. a = −g = −9.81 m/s 2 .)

Answers

Answer 1

Initial speed of the coin (u)= 0 (As the coin is released from rest)

Acceleration due to gravity (a) = g = 9.81 m/s²

Time of fall (t) = 1.5 s

From equation of motion we have:

[tex] \boxed{ \bf{v = u + at}}[/tex]

By substituting values in the equation, we get:

[tex] \longrightarrow [/tex] v = 0 + 9.81 × 1.5

[tex] \longrightarrow [/tex] v = 14.715 m/s

[tex] \therefore [/tex] Speed of the coin as it hits the ground/Final speed of the coin = 14.715 m/s

Answer 2

The speed of the coin as it hits the ground is 14.715 m/s.

We can solve the problem above using the equation of acceleration under gravity.

⇒ Equation:

v = u+gt................... Equation 1

⇒ Where:

The final velocity of the coinu = Initial velocity of the coing = acceleration due to gravityt = time

From the question,

⇒ Given:

u = 0 m/s (from rest)t = 1.5 sg = -9.81 m/s²

Substitute these values into equation 1

v = 0+1.5(-9.81)v = -14.715 m/s

Note the speed has a negative sign because it acts in the same direction as the acceleration due to gravity

Hence, the speed of the coin as it hits the ground is 14.715 m/s.

Learn more about gravitational motion here: https://brainly.com/question/17785701


Related Questions

It will take 3000 Joules of energy to push a large moving box up a ramp and into the back of a truck in 10 mins. If the length of the ramp is 15 meters, how much force will be required to accomplish this task?(include the units)

Answers

Answer:84

Explanation:

To solve this we must be knowing each and every concept related to force. Therefore, 200N is the force that  will be required to accomplish this task.

What is force?

When applied, force is described as an external source that alters or tends to modify the condition of the body. If indeed the body is moving this should come to rest, but if it is at rest, it will move. It can also induce changes in the body's orientation, form, size, and so on.

One example is pushing or shoving a door with force. Vector quantity, which means it has a magnitude as well as a direction. Newton's second law states that force is defined as the "product of such a body's acceleration and mass.

energy = 3000 Joules

time=10 mins

length = 15 meters

work= energy=force ×length

force ×15= 3000

force =200N

Therefore, 200N is the force that  will be required to accomplish this task.

To know more about force, here:

https://brainly.com/question/13014979

#SPJ2

A student hangs the south pole of a bar magnet near the north pole of
another hanging bar magnet. What do the magnets do?
A. They move away from each other.
B. They move away from each other, then toward each other.
C. They move toward each other.
O D. They do not move.

Answers

When the south pole of a bar magnet is near the north pole of another bar magnet, they move toward each other. Therefore, option (C) is correct.

What is a magnet?

A magnet can be described as a substance that creates a magnetic field and this magnetic field is the reason for the considerable properties of a magnet. The magnetic force pulls ferromagnetic materials, such as iron, cobalt, etc., and attracts or repels other magnetic substances.

A permanent magnet is composed of a material that is magnetized and produces its own magnetic field such material can be magnetized, and strongly attracted towards a magnet, is known as ferromagnetic, and contain the elements iron, and cobalt.

Each bar magnet possesses a set of North and South poles within them. The south pole of one magnet brings closer to the north pole of another magnet they attract each other and move toward each other.

Learn more about the magnet, here:

brainly.com/question/2841288

#SPJ5

Will give Brainliest
What are the most important methods and instruments used to predict volcanic eruptions?

Answers

Hey are you good at grade 10 physics?
(EDM, Leveling, GPS, tilt) to detect and measure volcanic gases (COSPEC) to predict how much lava is moving underground,

Un cuerpo viaja con una velocidad de 10 m/sg luego incrementa hasta 15 m/sg, este incremento fue durante 0 sg a 10 sg, ¿Cuál es la aceleración del cuerpo?

Answers

Answer:

Acceleration, [tex]a=0.5\ m/s^2[/tex]

Explanation:

The question says " A body travels with a speed of 10 m / s then increases to 15 m / s, this increase was during 0 s to 10 s, what is the acceleration of the body? ".

Initial speed, u = 10 m/s

Final speed, v = 15 m/s

Time interval, t = 10 s

We need to find the acceleration of the body. It is equal to the rate of change of velocity. It can be given by the formula as follows :

[tex]a=\dfrac{15-10}{10}\\\\a=0.5\ m/s^2[/tex]

So, the acceleration of the body is [tex]0.5\ m/s^2[/tex].

what is meant by heat energy​

Answers

Answer:

thermal

Explanation:

I think.Heat and thermal are the same

Answer: The biggest example of heat energy in our solar system is the sun itself. The sun radiates heat to warm us up on the planet earth. When the burner of a stove top is very hot, it is a source of heat energy. ... Automobile fuels such as gasoline are sources of heat energy, as is the hot engine of a race car or a school bus.

Explanation:  Here are some explainations

HELP ME !!!

A basketball has a mass of 1 kg and is traveling 12 m/s.

What would happen to the velocity if the momentum of the basketball were cut in half?


It would be doubled.


It would be cut in half.


It would be the same.


It would be tripled.

Answers

Answer:

It would be cut in half.

Explanation:

If the momentum of the ball is cut into half, the velocity will also be halved.

The momentum of a body is the amount motion a body possess.

Momentum is given as;

       momentum= m x v

Given that;

 mass  = 1kg

 velocity  = 12m/s

Now find the momentum;

            momentum  = 1 x 12 = 12kgm/s

Halving the momentum = 6kgm/s

              mass = 1kg

 Momentum  = 1 x v

       6  = 1 x v

           v  = 6m/s

We see that the velocity reduces by half

Answer:

It would be doubled.

Explanation:

I'm in K12

Inside a car that was at 273 K, a bottle with a pressure at 100,000 pascals warms up to
350 K. If the volume of the bottle remains constant, what is the pressure, in pascals,
inside the hot water bottle?

Answers

Answer:

P2 = 128,205 pascal.

Explanation:

Given the following data;

Original Pressure, P1 = 100,000 pascals

Original Temperature, T1 = 273K

New Temperature, T2 = 350K

To find new pressure P2, we would use Gay Lussac' law.

Gay Lussac's law states that when the volume of an ideal gas is kept constant, the pressure of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Gay Lussac's law is given by;

[tex] PT = K[/tex]

Where;

P represents pressure. T represents temperature. K is the constant of proportionality.

[tex] \frac{P1}{T1} = \frac{P2}{T2}[/tex]

Making P2 as the subject formula, we have;

[tex] P_{2}= \frac{P1}{T1} * T_{2}[/tex]

Substituting into the equation, we have;

[tex] P_{2}= \frac{100000}{273} * 350[/tex]

[tex] P_{2}= 366.3004* 350[/tex]

P2 = 128205.13 ≈ 128205 pascal.

Therefore, the pressure inside the hot water bottle is 128,205 pascal.

Physics help, please? :)
3. Consider a locomotive and the rest of a freight train to be a single object. Suppose the locomotive is pulling the train up a hill. Describe the action and reaction forces that cause the locomotive to move up the hill, such as the reaction force and gravity.
4. Is the force of the earth’s gravity on the sun stronger, weaker, or the same as the force of the sun’s gravity on the earth? Explain why the sun’s attraction affects the motion of the earth more than the earth’s attraction affects the sun’s motion. Employ Newton’s second and third laws in your answer.
If anyone could help me at all, with either question it would be greatly appreciated, Physics is my hardest subject, and I struggle with it.

Answers

Answer:

Explanation:

3. Newton’s third law explains how every action has an equal but opposite reaction, meaning that forces comes in pairs. While the locomotive’s wheels are pushing back against the ground as the action force, the ground is producing a reaction force towards the locomotive, propelling it forward. Another pair of forces that act on the locomotive is gravity and normal force. While gravity is pulling the locomotive towards the ground, the normal force the ground exerts on the locomotive is why the locomotive doesn’t fall through the ground.

4. The force of Earth’s gravity on the Sun is weaker than the force of the Sun’s gravity on Earth. The Sun’s attraction  affects the motion of Earth more than the Earth’s attraction affects the Sun’s motion because according to  Newton’s second law, force has mass as one of its factors. The Sun has a significantly higher mass than Earth,  meaning that its force of gravity would also be significantly higher. Newton’s third law is why the Earth doesn’t get  marginally closer to the Sun, stating that every action has an equal and opposite reaction. As the Sun is pulling  Earth towards itself, Earth is pulling away from the Sun.

What is energy saving..Write any three methods of saving energy..​

Answers

Answer:

Energy conservation is the effort made to reduce the consumption of energy by using less of an energy service. This can be achieved either by using energy more efficiently (using less energy for a constant service) or by reducing the amount of service used (for example, by driving less).

Explanation:

What is the acceleration of a 3 kg mass being pushed by 13N of force?​

Answers

Answer:

The answer is 0.23 m/s²

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

f is the force

m is the mass

From the question we have

[tex]a = \frac{3}{13} \\ = 0.230769...[/tex]

We have the final answer as

0.23 m/s²

Hope this helps you

How do I learn the basics of physics

Answers

Physics is a natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force.
Matter is generally considered to be anything that has mass and volume.
Scientific laws and theories express the general truths of nature and the body of knowledge they encompass. These laws of nature are rules that all natural processes appear to follow.

The weight of an object is determined by it X
. ?
Mass
Gravity
Height
Both A&B

Answers

Answer:

gb  tbbyeyb

Explanation:

What would happen if the compass were moved to the location of the black X
in the diagram?
Me Magnets
O A. The arrows on the magnetic field lines would point in the opposite
directions.
B. The locations of the magnet's north and south poles would switch.
C. The red part of the compass needle would point toward the
magnet's south pole.
D. The red part of the compass needle would point in the opposite
direction

Answers

Answer:

It is C

Explanation:

The red part of the compass needle would point toward the magnet's south pole.

What is compass?

A compass is a tool used for geographic orientation and navigation that displays the cardinal directions. It typically consists of a magnetized needle or other component that may pivot to line up with magnetic north, like a compass card or compass rose.

Compass is a device used to find the direction north and south it is aligned with direction of magnetic field of earth.

The red part of the compass needle would point toward the magnet's south pole.

To learn more about compass refer to the link:

brainly.com/question/28136911

#SPJ5

The car's initial speed was 15 m / s and the distance the car travels before it comes to a complete stop after the driver applies the brakes is 63m. What is the magnitude of the car's acceleration?

Answers

Initial speed of the car (u) = 15 m/s

Final speed of the car (v) = 0 m/s (Car comes to a complete stop after driver applies the brake)

Distance travelled by the car before it comes to halt (s) = 63 m

By using equation of motion, we get:

[tex] \bf \longrightarrow {v}^{2} = {u}^{2} + 2as \\ \\ \rm \longrightarrow {0}^{2} = {15}^{2} + 2 \times a \times 63 \\ \\ \rm \longrightarrow 0 = 225 + 126a \\ \\ \rm \longrightarrow 126a = - 225 \\ \\ \rm \longrightarrow a = - \dfrac{225}{126} \\ \\ \rm \longrightarrow a = - 1.78 \: m {s}^{ - 2} [/tex]

[tex] \therefore [/tex] Acceleration of the car (a) = -1.78 m/s²

Magnitude of the car's acceleration (|a|) = 1.78 m/s²

What is potential mechanical energy

Answers

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position.
Mechanical energy IS potential energy+Kinetic energy.

can anyone solve this?
Carol pushes down at an angle of 30 degrees from the vertical on a 10.0 kg wood crate causing the crate to move across a wood floor at a constant velocity of 2.0 m/s. How much force does Carol exert on the crate? (μs = 0.5 and μk = 0.2)

Answers

Answer:

F = 39.2 N

Explanation:

Since, the object is in uniform motion. Therefore, the frictional force on object will be:

Frictional Force = μk N = μk mg

where,

μk = coefficient of kinetic friction = 0.2

m = mass of crate = 10 kg

g = 9.8 m/s²

Therefore,

Frictional Force = (0.2)(10 kg)(9.8 m/s²)

Frictional Force = 19.6 N

The horizontal component of force must be equal to this frictional force to continue the uniform motion:

F Sin 30° = 19.6 N

F = 19.6 N/Sin 30°

F = 39.2 N

Its a bit confusing. Please answer.​

Answers

Answer : c
Because : first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force

Answer:

c is answer ...............

Help!!
Remember W = mg, 1 kg = 2.2 lbs. S
1) If you have a 12 lbs. bag of potatoes what is its mass? What is its weight?

Answers

Answer:

5.5 KG is the mass

53.9 is the Weight

anybody got any answers???

Answers

Answer:

b? to a?

Explanation:

It converts mechanical energy to electrical.

Therefore, Option A is the correct answer

For a straight line on a position-time graph, the slope of the line represents:
Group of answer choices

velocity

displacement

acceleration

distance

Answers

Slope is actually speed but the best answer from the choices would be velocity.

why people bleed from nose while climbing uphill rapidly​

Answers

Answer:

Explanation:

Nosebleeds can be caused by being up in a very high altitude. As you climb higher, the amount of oxygen in the air decreases. This makes the air thinner and dryer, which can in turn cause the inside of your nose to crack and bleed.

which other element is most likely to be a non-reactive gas
A. Na, number 11

B. F, number 9

C. Cs, number 55

D. Xe, number 54​

Answers

Answer:

C

Explanation:

23 POINTS
Sally and Ann are trying to move a box across the floor. Sally is pushing the box to the right with a force of 100N and Ann is pulling the box with a force of 50N to the right. What is the magnitude and direction of the box?
50N to the left
150N to the right
50N to the right
The box is balanced and will not move

Answers

It would be 150N to the right since they are moving it in the same direction.

Answer: 150N to the right...

Force acting on the box applied by Sally,  F1= 100 N (right side)

Force acting on the box applied by Ann,  F2= 50 N (right side)

It is clear that the two forces are acting on same direction. Let right side is positive direction. So, F= F1 + F2

                                       F= 100+50

                                        F=150 N

  The direction of the box is towards the right side. So, the correct option is 150 N to the right... Hope this helps... Plz mark me brainliest.... Stay safe and have a great weekend!!! :D

aluminium is metal or metalloid

Answers

Answer:

Aluminium is just on the metal side of the border between metals and metalloids, so it is not considered to be a metalloid

Explanation:

it is a metal

Answer:

Aluminum-(Al) is a metal

An object of mass(0.8kg) is attached to massless string of length (2.0),and swung with a tangential velocity of (3.0m/s) what is the tension in the string?

Answers

Answer:

3.6 N

Explanation:

The magnitude of centripetal force in this case is equal to the magnitude of tension in the spring.

The formula is :

T= mv²/r ------where T is tension

m= mass of object =0.8 kg

v= velocity of object {tangential velocity} = 3.0 m/s

r= length of string = 2m

Applying the formula with real values;

T= mv²/r

T= {0.8 * 3²} / 2

T= { 7.2}/2 = 3.6 N

A 700-kg car, driving at 29 m/s, hits a brick wall and rebounds with a speed of 4.5 m/s. If the car was in contact with the wall for 0.30 s, what force did the wall exert on the car during the collision?

Answers

Answer:

57166.6N

Explanation:

Step one:

given data

mass=700kg

initial velocity u=29m/s

final velocity=4.5m/s

time t= 0.3second.

Step two:

The expression for the momentum is given as

FΔt=mΔv

make F subject of the formula

F=mΔv/Δt

Substitute our given data we have

F=700(29-4.5)/0.3

F=700*24.5/0.3

F=17150/0.3

F=57166.6N

the force is 57166.6N

Finding the area of a trapezoid on a velocity versus time graph will tell you
the ——————
of an object.
A. displacement
B. acceleration
C. velocity
D. distance

Answers

the answer is c. velocity

how much power is needed to produce 500 joules of work if 20 watts are used?

Answers

350 produce hope this helps
Answer:25 produce
I might be wrong

If a water balloon is launched with an initial velocity of 30.1 meters per second, at an angle of 24 degrees above horizontal, how much time will it take the balloon to reach the ground again?
Please provide an explanation as well.

Answers

Answer:

t = 24.48/10 will = 2.45 sec

The time taken to reach the ground if, a water balloon is launched with an initial velocity of 30.1 meters per second, at an angle of 24 degrees above horizontal is 2.5 seconds.

What is velocity?

When an item is moving, its velocity indicates how quickly its location is changing as seen from a specific point of view and as measured by a specific unit of time.

If a point travels a specific distance along its path in a predetermined amount of time, its average speed throughout that time is equal to the traveled distance divided by the travel time. For instance, a train traveling 100 km in two hours is moving at an average speed of 50 km/h.

Given:

The initial velocity, v = 30.1 m/s

The angle of projection, a = 24°,

Calculate the time taken to reach the ground as shown below,

Time = 2vsina / g

Time = 2 × 30.1 × sin24 / 9.8

Time = 60.2 × 0.406 / 9.8

Time =24.485 / 9.8

Time = 2.499 or 2.5

Thus, the time taken to reach the ground is 2.5 seconds.

To know more about velocity:

https://brainly.com/question/19979064

#SPJ2

When two soft, deformable objects such as two balls of putty collide,
A)the internal energy is conserved
B) the kinetic energy is conserved
C) chemical energy is conserved as the objects get warmer
D) the sum of the kinetic energy and the internal energy is conserved

Answers

Answer:

D) the sum of the kinetic energy and the internal energy is conserved

Explanation:

When  soft deformable objects such as two balls of putty collide, their total energy will be conserved , according to law of conservation of energy .

Their energy involves kinetic energy and potential energy . Their kinetic energy is due to their motion . Their potential energy is due to their shape . If there is change in their shape , there will be change in their potential energy .

Their internal energy consists of potential energy and thermal energy . Due to collision , heat will be produced so their thermal energy will also change . In this way there will be change in their internal energy .

But in spite of all these changes , total energy will be conserved . That means if one form of energy is reduced , the other kind will be increased  and so on.

Hence  the sum of the kinetic energy and the internal energy is conserved

Other Questions
A cubehas a mass of 9 grams and each side is 3 cm3. What is the density of the sample?a.0.33 g/mLb.36g/mLc.3g/mLd.18g/mL(I know this aint math but no one answers science stuff -_-) What is the length of DE and the length of AB Which describes radioactive decay of a substance? hurry please!!!!!!!!!!!!!!!! Which line would be most appropriate to include when writing for parents? Explain why the voting can be considered both a right and a responsibility. what are the type of education? Present a brief explanation Describe the compromises and clashes experienced by Hispanics when colonists began to move to the southwest. Help me find the given A student has a class with four tests, each worth 100 points, and has earned thesescores on the first three tests: 75, 74, 71. What is her average now? What score mustshe earn on the fourth test to get a B (80) in the class? Please help me with this :(( Using following sequence: a1 = 68an = an-1 - 11Identify the first 4 terms of the sequence.68, 79, 90, 101,...68, 57.46, 35, ...-11, -22, -33, -44, ...(I NEED HELP) Solve this algebraic expression:5x-2(3x) Please select the best answer from the choices provided BRAINLIEST TO FIRST PERSON!!!!!!!!!!!!When Rosa Parks refused to give up her seat to a white passenger, the mayor of Montgomery prohibited her from riding buses in the city transit system.Please select the best answer from the choices providedTrueFalse Expand the expression 2(30x-24) what is the change in elevation from point a to point C the map above complete las oraciones con la forma apropiada del indicativo o del subjuntivo del verbo entre parntesis, segun el contexto1. Estoy buscando a alguien que (querer) viajar a Europa. 2. No conozco a nadie que (ir) de vacaciones en invierno, pero tengo varios amigos que siempre un (viajar) en verano. 3. Hoy dia hay pocos bebs que (nacer) en casa. 4 Conozco a alguien que (acabar) de tener una boda grande. 5. Algunos muchachos solo quieren encontrar una novia que (ser) rica y bonita. How are they affected a long walk to water chapter 8 1. Which of the following is the equation of a line that has a slope 5 and passes through the point(3,- 7)?