Answer:
h = 0.25 [m]
v = 3.26 [m/s]
Explanation:
In order to solve this problem, we must remember that mechanical energy is defined as the sum of kinetic energy plus potential energy.
E1 = Ek + Ep
where:
E1 = mechanical energy = 25 [J]
Ek = kinetic energy = 17 [J]
Ep = potential energy [J]
25 = 17 + Ep
Ep = 8 [J]
Now the potential energy is defined by the following equation:
Ep = m*g*h
where:
m = mass = 3.2 [kg]
g = gravity acceleration = 9.81 [m/s²]
h = elevation [m]
8 = 3.2*9.81*h
h = 0.25 [m]
The velocity can be calculated by means of kinetic energy.
[tex]E_{k} =\frac{1}{2} *m*v^{2}\\17 =\frac{1}{2} *3.2*v^{2} \\v= \sqrt{\frac{17*2}{3.2} }\\v = 3.26[m/s][/tex]
(a) The height of the ball will be h=0.25 m
(b) The speed of the ball will be [tex]V= 3.26\ \frac{m}{s}[/tex]
What will be the speed and the height of the ball?It is given that
Mass of the ball m=-3.2kg
The kinetic energy of the ball = 17 j
The total mechanical energy of the ball = 25 J
(a) So the total mechanical energy is the sum of the kinetic energy of the ball and the potential energy of the ball.
[tex]E_T=E_{KE}+E_{PE}[/tex]
Now putting the values of the KE and the Total energy we get
[tex]25=17+E_{PE}[/tex]
[tex]E_{PE}=8 \ J[/tex]
Now the formula of the potential energy will be
[tex]E_{PE}=mgh[/tex]
[tex]8=3.2\times 9.81 \times h[/tex]
[tex]h= \dfrac{8}{3.2\times 9.81}[/tex]
[tex]h=0.25\ m[/tex]
(b) Now to find out the speed of the ball we have
[tex]E_K=17\ J[/tex]
[tex]E_K=\dfrac{1}{2} mv^2[/tex]
[tex]v=\sqrt{\dfrac{2E_{KE}}{m} }[/tex]
[tex]v=\sqrt{ \dfrac{2\times17}{3.2} }=3.25[/tex]
[tex]v=3.25 \ \dfrac{m}{s}[/tex]
So the calculated answers will be
(a) The height of the ball will be h=0.25 m
(b) The speed of the ball will be [tex]V= 3.26\ \frac{m}{s}[/tex]
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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.
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
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?
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
What is energy saving..Write any three methods of saving energy..
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:
How do I learn the basics of physics
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
Answer:
C
Explanation:
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What are the most important methods and instruments used to predict volcanic eruptions?
What is potential mechanical energy
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.
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.
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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.
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.
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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?
Answer:
57166.6NExplanation:
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
For a straight line on a position-time graph, the slope of the line represents:
Group of answer choices
velocity
displacement
acceleration
distance
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?
Answer:
5.5 KG is the mass
53.9 is the Weight
how much power is needed to produce 500 joules of work if 20 watts are used?
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
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
The weight of an object is determined by it X
. ?
Mass
Gravity
Height
Both A&B
Answer:
gb tbbyeyb
Explanation:
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)
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
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
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.
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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?
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 meant by heat energy
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
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
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
why people bleed from nose while climbing uphill rapidly
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.
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?
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.
anybody got any answers???
Answer:
b? to a?
Explanation:
It converts mechanical energy to electrical.
Therefore, Option A is the correct answer
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?
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 the acceleration of a 3 kg mass being pushed by 13N of force?
Answer:
The answer is 0.23 m/s²Explanation:
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/s²Hope this helps you
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.
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.
aluminium is metal or metalloid
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
Its a bit confusing. Please answer.
Answer:
c is answer ...............
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)
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.
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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
