The water exerts a net drag force on the boat, and tends to make the boat move along with the average water flow, or stay put if the water isn't going anywhere. The water will heat up slightly as energy from the big motion ...
The coefficient of kinetic friction between a floor and a box made of wood is µk = 0.13. How far does the box slide if it has an initial speed of v0 = 7.0 m/s?
Answer:
s = 19.23 m
Explanation:
Since, the frictional force is given as:
f = μN = μW
f = μmg ----------- equation (1)
but, from Newton's 2nd Law:
f = ma -------------- equation (2)
comparing equation (1) and equation (2):
ma = μmg
a = μg
here,
a = acceleration of puck
μ = coefficient of static friction = 0.13
g = -9.8 m/s² (negative sign for slowing down of puck)
Therefore,
a = (0.13)(-9.8 m/s²)
a = -1.274 m/s²
Now, using 3rd equation of motion:
2as = Vf² - Vi²
where,
s = distance covered = ?
Vf = Final Velocity = 0 m/s (since, puck finally stops)
Vi = Initial Velocity = 7 m/s
Therefore,
2(- 1.274 m/s²)s = (0 m/s)² - (7 m/s)²
s = (- 49 m²/s²)/(- 2.548 m/s²)
s = 19.23 m
plz help urgent
i will give brainliest
Answer:
The answer is D. Balanced forces
Hope it helps.......... pls mark as brainliest
1.
If a truck that is traveling at 15 mph speeds up to 45 mph in 10 seconds, what is the truck’s acceleration? HELP me please!!!! this is a QUIZ!!!!
Answer:
3mph
Explanation:
a=v(final)-v(initial)/t
=45-15/10
=30/10
=3mph
Answer:
3mph
Explanation:
On the graph below, the line crosses the x axis on a velocity versus time
graph. What does this tell you about the motion of the object?
A. Slowing down
B. Speeding up
C. Changing direction
D. Changing speeds
A motorcycle has 100,000 J of kinetic energy and is traveling at 20 m/s. Find its mass.
Answer:
The answer is 500 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{2KE}{ {v}^{2} } \\ [/tex]
v is the velocity
KE is the kinetic energy
From the question we have
[tex]m = \frac{2 \times 100000}{ {20}^{2} } = \frac{200000 }{400} = \frac{2000}{4} \\ [/tex]
We have the final answer as
500 kgHope this helps you
which has a higher viscosity orange juice or chocolate syrup
I need an answer fast plz
Answer:
L = 1.5 [m]
Explanation:
To find the Force Z we must perform a sum of forces on the Y-axis equal to zero, (it is equal to zero since there is no movement, the beam is in equilibrium).
ΣFy = 0
- 30 - 20 - 40 + Z = 0
Z = 90 [N]
Now to find the length of the beam, we must perform a sum of moments equal to zero at the midpoint of the beam, where the load Z is applied.it is important to clarify that the moment generated by the force of 30[N] tends to rotate the beam counterclockwise (is taken as positive), while the load of 20 [N], tends to rotate the beam Clockwise (is taken as negative).
ΣM = 0
+ (30*0.5) - (20*x) = 0
15 = 20*x
x = 15/20
x = 0.75 [m] (this is the half of the distance)
L = 2*x
L = 2*0.75
L = 1.5 [m]
Which of the following is the best way to decrease an objects acceleration?
Increase mass
Reduce friction
Decrease mass
Increase force
Answer:
its D
Explanation:
i took the assignment, its D
A pumpkin is thrown horizontally off of a building at a speed of 2.5 m/s and travels a horizontal distance of 12 m before hitting the ground.
What was the initial height of the pumpkin?
What was the final vertical velocity of the pumpkin?
Answer:
-47.04
Explanation:
Divide 12 m by 2.5 m/s which equals 4.8s
And then use 4.8s to multiply it with -9.8
4.8(-9.8)= -47.04 m/s
Hope this helped!! :)
The initial height of the pumpkin is 23.52m and the final vertical velocity of the pumpkin is 47.04 m/s.
Laws of motion:Initial horizontal speed, u = 2.5 m/s
horizontal distance covered , d = 12m
So the time taken is:
t = d/u
t = 12/2.5 s
t = 4.8s
Now, the initial vertical speed, v = 0
So the vertical distance traveled by the pumpkin will be equal to the initial height of the pumpkin:
s = vt + ¹/₂gt²
s = 0.5 × 9.8 × 4.8 m
s = 23.52m
Final vertical velocity:
v' = v + gt
v' = 9.8 × 4.8 m/s
v' = 47.04 m/s
Learn more about laws of motion:
https://brainly.com/question/26083484?referrer=searchResults
Se lanza una pelota y regresa al punto de partida 2.5 s después ¿Que altura máxima alcanzara? ¿a que altura se hallaba 1 segundo después del lanzamiento?
Answer:
a) [tex] y_{max} = 7.7 m [/tex]
b) y = 7.4 m
Explanation:
a) La altura máxima que alcanza la pelota se puede encontrar usando la siguiente ecuación:
[tex] y_{max} = y_{0} + v_{0y}t - \frac{1}{2}gt^{2} [/tex] (1)
En donde:
[tex]y_{0}[/tex]: es la altura inicial = 0
[tex]v_{0y}[/tex]: es la velocidad inicial en y
g: es la gravedad = 9.81 m/s²
t: es el tiempo
Primero debemos encontrar la velocidad inicial en y:
[tex] v_{fy} = v_{0y} - gt [/tex]
Sabiendo que la velocidad final en y es igual a cero (en la altura máxima), y con t = 1.25 s (la mitad del tiempo total) tenemos:
[tex] v_{0y} = gt = 9.81 m/s^{2}*1.25 s = 12.3 m/s [/tex]
Ahora, podemos encontrar la altura máxima:
[tex] y_{max} = v_{0y}t - \frac{1}{2}gt^{2} = 12.3 m/s*1.25 s - \frac{1}{2}9.81 m/s^{2}*(1.25 s)^{2} = 7.7 m [/tex]
b) Podemos encontrar la altura cuando t = 1 s con la misma ecuación (1):
[tex]y_{max} = y_{0} + v_{0y}t - \frac{1}{2}gt^{2} = 12.3 m/s*1 s - \frac{1}{2}9.81 m/s^{2}*(1 s)^{2} = 7.4 m[/tex]
Por lo tanto, la pelota se encontraba a 7.4 m luego de 1 segundo despúes del lanzamiento.
Espero que te sea de utilidad!
A car accelerates from 20 m/s to 80 m/s in 5 seconds. What is the
average acceleration of the car?
a 20 m/s2
b 12 m/s2
C 4 m/
d 16 m/s2
Answer:
12m/s2
Explanation:
:D (just a smiley, not answer d)
The law of conservation of matter states that matter can be neither created nor
destroyed. Your friend shows you the following chemical equation:
CaCO3+CaO+CO,
He says that because the oxygen atoms are split iretween two different molecules in
the products, the equation does not support the law of conservation of matter. Is
your friend right? Explain your answer.
The equation you wrote is incorrect,
the correct is: CaCO3+CaO+CO2
The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed. Therefore, the quantity of mass is conserved over time.
Your friend is incorrect in saying that this doesn't follow the law of conservation of mass. The molecule of oxygen is split up but the number of total atoms of oxygen is same. So, it follows the law of conservation of mass.
Question 2 The gravitational force between two objects with identical masses that are 10 m apart, is 2.67 x10-10 N. To the nearest kg, what is the mass of each object? -11 Nom? Se G= Universal Gravitational Constant = 6.67 x 10 kg? 2 kg O O 10 kg 20 kg O 200 kg
Answer 888990,0 kg
Explanation:
888990,0 kg is the mass of the object.
What is Gravitational force?
Any two mass-containing objects are attracted to one another by the gravitational force. Because it consistently attempts to pull masses together rather than pushing them apart, the gravitational force is known as attractive.
Newton's Universal Law of Gravitation is what it is known as.
Admittedly, you aren't pushing on those other objects all that much because you don't have a very large mass. Additionally, items that are very far apart from one another do not clearly tug on one another.
Therefore, 888990,0 kg is the mass of the object.
To learn more about Gravitational constant, refer to the link:
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#SPJ2
Two cars moving A and B moving with velocity of 12m/s and 8 m/s respectively in same direction. Find the relative velocity with respect to B. If they move in opposite direction, What will be the relative velocity?
Answer:
b
Explanation:
HELP MEEEEE HURRRYYYY EASYY
What best describes the greatest height a ball will bounce off the ground after being dropped from a height of 50 centimeters?
A. Less than 50 centimeters, as the ball transforms some of its thermal energy into sound energy
B. Less than 50 centimeters, as the ball transforms some of its potential energy into sound energy
C. Greater than 50 centimeters, as the ball transforms some of its thermal energy into potential energy
D. Greater than 50 centimeters, as the ball transforms some of its potential energy into thermal energ
Answer:
C
Explanation:
thats what i think it depends on the amount of force someone dropped the ball with.
Answer: A) "Less than 60 centimeters, as the ball transforms a part of its potential energy into heat energy"
Explanation:
I took the test
5. Describe the trip from your home to school using the words
position, distance, displacement, and speed.
My commute to school is a constant distance, but the time it takes to get there fluctuates owing to traffic.
What is displacement?If an object moves with respect to a reference frame, such as when a passenger travels to the back of an airliner or a professor moves to the right with respect to a whiteboard, the item's position changes.
This change in location is described as displacement.
My commute to school is a constant distance, but the time it takes to get there fluctuates owing to traffic,
The initial and the final position of the commute is the same, but the displacement varies with the route which affects my car's speed and where it is in line at stop lights.
Learn more about displacement here, refer to the link;
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plz help urgent
will give brainliest
Answer:
D
Explanation:
Highest Pressure in water is always at the bottom
why you are Mercury column in thermometer first decends slightly and then rises when placed in hot water?
Explanation:
Because When placed on hot water, the thermometer itself expands slightly first so the Mercury appears to be descending. After the thermometer expands slightly, the Mercury expands. Hence, Mercury column in thermometer first decends slightly and then rises when placed in hot water
Answer:
Any liquid in a container, when heated, at first it's level goes down a little, then rises.
It's because the container volume increases first, before the liquid gets hot. So the level goes down. It takes a little longer to heat up the whole volume of the liquid. A little later, as the liquid gets heated up, it expands faster than the container and the level rises.
In general, coefficient of thermal expansion is higher for liquids than solids.
This is why the mercury level first goes down then rises.
What affects the vertical velocity of a projectile over time?
---
PLEASE help and dont write silly stuff cuz i will report you
i want a Claim,Evidence, reasoning and a rebuttal.
Answer:
it is push or pull and it is machanical energy but the arrows are going out so it means it is pull
the reason is because it the arrows are going out that means they are using mecanichal energy bc they using hands the evedance is that we can identify the energy
cuky and Magneton Post. Tout (OL//17
A student has wired lights for a model house project for class. To properly demonstrate the circuit, the student wants to show that Bulb #3
will not light, but all of the others do.
Peshw1
Lik
LE
Reso2
At which point must the break in the circuit be located for this to happen, provide evidence to support your claim and what would one need
to do in order to make the entire circuit work? (AKS 10b)
Answer:
the switch or the wire
Explanation:
While spending the weekend in your cabin, you burn wood in your pot-bellied stove to heat a kettle of water for tea.
Answer the following questions for 2 points each:
1. What type of energy does the wood have in this situation. Explain your answer.
2. What type of energy is this transformed into as the wood it burned in the stove. Explain your answer.
3. What type of heat transfer is being used to warm the kettle of water? Why does the water eventually boil?
Answer: 1 = Heat
2=gas
3=it gets hot enough to boil because the metal conducts the heat into the water to heat it up and eventually boil.
Explanation: its common sense
HELPPPPPP
The force of gravity of objects on the moon is approximately one-sixth of their value on Earth. Joe weights 600 N on earth. Joe's mass on the moon will be approximately______.
a. 60 kg
b. 100 kg
c. 1000 kg
d. 6000 kg
e. 60 N
f. 100 N
g. 1000 N
h. 6000 N
i. nonsense! None of these values are even close.
Answer:
a) 60kg
Explanation:
mass is not affected by gravity
The mass of Joe on the moon is approximately 60 kg. Hence, option (a) is correct.
Given data:
The weight of Joe is, W = 600 N.
The weight of any object is the product of mass and gravitational acceleration of an object. It is the expressed as,
W = mg
Here,
m is the mass of Joe.
g is the gravitational acceleration.
Solving as,
W = mg
600 = m × 10
m = 60 kg.
Thus, we can conclude that the mass of Joe on the moon is approximately 60 kg. Hence, option (a) is correct.
Learn more about the Gravity here:
https://brainly.com/question/21454806
What is the difference between distance and position?
Explanation:
HERE you go. hope this helps.
boruto vs kid sasuke
Answer:
obviously sasuke
Explanation:
everyone is always over estimating borutos powers like lets be real here sasuke is almost as strong as naruto and when they were younger he had better hand to hand combat and in jutsu's he was a prodigy and he is able to calculate precise movements to try and defeat his oponent lets not forget that he has the sharingon over whatever jutsus boruto has (i dont know because ive never seen the anime and i dont plan on doing so) (i hate boruto its trash) which means he could read borutos chakra and he would be more powerful because his sharingan awoken when he was a mear child he would be much more powerful beause hes mastered his sharingan. oh yeah and his fire ball and chidori (which could k!11 boruto if sasuke inflicts enough chakra into his jutsu) (if u want to say otherwise my pronouns are she/her so use them if u want to say something involving pronouns thanks)
Many people keep a compost pile in their backyards. They use the compost as fertilizer for their flower beds. Which of the following correctly describes the disposal of waste by composting?
A.
Yard wastes such as grass clippings are not suitable for composting because they contain low levels of nutrients.
B.
Composting reduces the amount of waste sent to landfills by restaurants, food-processing plants, and animal feedlots.
C.
Compost made from glass and plastics can be recycled and used as building materials.
D.
Composting is a good way for individuals to reduce the amount of garbage they send to the landfill, but large-scale composting is impractical.
Answer:
I would think B for the answer
Answer:
B
Explanation:
Will the temperature of a plastic or wooden spoon be more than the temperature of a metal spoon if you put both of these in a cup of boiling hot water after 5 minutes? PLZ HELP, will mark brainliest
Answer:
no
Explanation:
the metal spoon would be higher temperature
Answer:
Yes
Explanation:
If you were making an electric device and needed a piece that would easily transmit an electric charge and also not react with other materials, what material would you choose?
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of options. However, one material that is good candidate for conducting electricity without reacting with other materials is metallic vanadium dioxide. This is because of the inability of this electrical conductor to conduct heat (an unusual property for all other electrical conductors) and thus makes it difficult for it to react with other materials (since an increase in temperature increases possibility of a reaction).
Bella and her puppy ran up the stairs together. Her puppy got to the top of the stairs first. Which statement is true?
A. Bella did more work and has more power
B. The puppy did more work and has more power
C. They did the same amount of work and have the same amount of power.
D. The work was the same but the power was different.
Answer:
B
Explanation:
B because if bella had both of power and work she would have got up there first and puppy has more power and work cause there fastttt
A train traveling at 48 m/s begins to slow down as it approaches a bend in the tracks. If it travels around the bend at a speed of 14 m/s, and it takes 40 seconds to properly slow down, what is the acceleration acting on the train during this time?
Please help 5 minutes left please!,
Answer:
Acceleration is (48-14)/40 m/s² = 34/40 m/s² = 0.85 m/s²
The acceleration acting on the train during this time of travel is 0.85m/s²
HOW TO CALCULATE ACCELERATION:
The acceleration of a moving body can be calculated by using the formula below:a = (v - u)/tWhere;
a = acceleration (m/s²)v = final velocity (m/s)u = initial velocity (m/s)t = time (s)According to this question, a = ?, v = 48m/s, u = 14m/s, t = 40s.a = (48 - 14)/40a = 34/40a = 0.85m/s²Therefore, the acceleration acting on the train during this time of travel is 0.85m/s².Learn more at: https://brainly.com/question/2040396?referrer=searchResults
