Question

A crate is pulled a displacement of 10.00 m to the East across a horizontal surface...

  1. A crate is pulled a displacement of 10.00 m to the East across a horizontal surface using a force of 500.0 N against a frictional force of 100.0 N. The crate’s mass is 20.0 kg and its initial velocity is 2.0 m/s to the East.
  1. Draw a free body diagram of the crate, labelling all forces.
  2. Determine the net work done on the crate. Use the work-kinetic energy theorem to determine the velocity of the crate after it has travelled 10.00 m. Briefly explain why saying that the net work done on an object is zero does not necessarily mean that the object is at rest.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Net work done on an object is zero means that there is no change in its kinetic energy. This means that the initial kinetic energy and the final kinetic energy are the same. Nowhere does it say that the object is at rest. The object can be either in motion or rest. Net work being zero has no bearing on it.

Please support by giving a positive rating. Thank you!

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A person pulls a 50-kg crate over a displacement of 40-m along a horizontal floor with...
A person pulls a 50-kg crate over a displacement of 40-m along a horizontal floor with a rope of 100N tension. The rope makes an angle of 37o with the horizontal surface. The floor is rough, exerting a friction force of 60 N. (a) Determine the work done by each of the forces acting on the crate. (b) Determine the final speed of the crate assuming it started from rest.
A 8.4 kg crate is pulled 4.7 m up a 30 degree incline by a rope...
A 8.4 kg crate is pulled 4.7 m up a 30 degree incline by a rope angled 15 degrees above the incline. The tension in the rope is 130 N and the crate's coefficient of kinetic friction on the incline is 0.27. 1.) What is the workd done by the Normal Force? 1.) What is the work done by the Frictional force? ANSWER: -47.7J 2.) What is the total work done on the crate? ANSWER: 349J 3.) If the object...
A 55-kg crate is pulled horizontally 7.0 m across the floor by a force F whose...
A 55-kg crate is pulled horizontally 7.0 m across the floor by a force F whose magnitude is 160 N. The force F is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. A. If the crate starts from rest, use the work-energy theorem to find the velocity of the crate after it has moved 7.0 m horizontally. B. After the crate has moved 7.0 m horizontally, the external force F no longer acts on...
1.) Steve pushes a crate 20 m across a level floor at a constant speed with...
1.) Steve pushes a crate 20 m across a level floor at a constant speed with a force of 200 N. The velocity of the crate is in the direction of the force Steve is applying to the crate. How much work is done by Steve? 2.) Steve pushes a crate 20 m across a level floor at a constant speed with a force of 200 N. The velocity of the crate is in the direction of the force Steve...
A crate of mass 9.6 kg is pulled up a rough incline with an initial speed...
A crate of mass 9.6 kg is pulled up a rough incline with an initial speed of 1.40 m/s. The pulling force is 98 N parallel to the incline, which makes an angle of 19.5° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.98 m. (a) How much work is done by the gravitational force on the crate? J (b) Determine the increase in internal energy of the crate–incline system owing to friction....
A crate of mass 9.6 kg is pulled up a rough incline with an initial speed...
A crate of mass 9.6 kg is pulled up a rough incline with an initial speed of 1.52 m/s. The pulling force is 104 N parallel to the incline, which makes an angle of 20.4° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.92 m. (a) How much work is done by the gravitational force on the crate? J (b) Determine the increase in internal energy of the crate–incline system owing to friction....
A crate of mass 10.2 kg is pulled up a rough incline with an initial speed...
A crate of mass 10.2 kg is pulled up a rough incline with an initial speed of 1.56 m/s. The pulling force is 92 N parallel to the incline, which makes an angle of 19.0° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 5.04 m. (a) How much work is done by the gravitational force on the crate? J (b) Determine the increase in internal energy of the crate–incline system owing to friction....
A crate of mass 10.6 kg is pulled up a rough incline with an initial speed...
A crate of mass 10.6 kg is pulled up a rough incline with an initial speed of 1.52 m/s. The pulling force is 94 N parallel to the incline, which makes an angle of 20.2° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.94 m. (a) How much work is done by the gravitational force on the crate? (b) Determine the increase in internal energy of the crate–incline system owing to friction. (c)...
A 7.8 kg crate is pulled 5.4 m up a 30o incline by a rope angled...
A 7.8 kg crate is pulled 5.4 m up a 30o incline by a rope angled 19o above the incline. The tension in the rope is 120 N and the crate's coefficient of kinetic friction on the incline is 0.24. a) How much work is done by tension, by gravity, and by the normal force? b) What is the increase in thermal energy of the crate and incline?
An 8.2 kg crate is pulled 5.4 m up a 30∘ incline by a rope angled...
An 8.2 kg crate is pulled 5.4 m up a 30∘ incline by a rope angled 17 ∘ above the incline. The tension in the rope is 120 N and the crate's coefficient of kinetic friction on the incline is 0.26. How much work is done by tension, by gravity, and by the normal force? What is the increase in the thermal energy of the crate and incline? NV I have figured it out I wasn't thinking normal force was...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT