Question

Notify Me Bookmark

A 4.9 kg block is on a horizontal surface. A person pushes horizontally on the block. The coefficient of static friction between block and surface is 0.21 and the coefficient of kinetic friction is 0.19. The block is initially at rest when a pushing force of 16.9 N is applied. During the segment of time that this push is applied, the surface below applies a friction force of magnitude N.

A 4.9 kg block is on a horizontal surface. A person pushes horizontally on the block. The coefficient of static friction between block and surface is 0.21 and the coefficient of kinetic friction is 0.19. The block is initially at rest when a pushing force of 16.9 N is applied. During the segment of time that this push is applied, the surface below applies a friction force of magnitude N.

Image text
A 4.9 kg block is on a horizontal surface. A person pushes horizontally on the block. The coefficient of static friction between block and surface is 0.21 and the coefficient of kinetic friction is 0.19 .
The block is initially at rest when a pushing force of 16.9 N is applied. During the segment of time that this push is applied, the surface below applies a friction force of magnitude N .

Detailed Answer

0 0

Please enter your email here. You will get email when this question is answered by our tutor.

Doubtrix Logo

Problem is not yet solved!

Click on Notify me to get email when question is answered.

Join Doubtrix with 7-days free trial

  • Icon Correct & Verified Answers
  • Icon No AI-Generated Answers
  • Icon Video Solution for Difficult Questions
  • Icon Work With Experts to Reach at Correct Answers
Notify me Login Sign Up

Similar/Related Questions

A 100 N box is initially at rest on a rough horizontal surface. The coefficient of static friction between the block and the surface is 0.6 and the coefficient of kinetic friction is 0.4 . A man decides to move the box so he applies a steadily increasing horizontal force FApplied on the box to the right as shown. The graph on the left below shows the horizontal force FApplied on the box as it goes from 0 to 80 N as a function of time over 4 seconds. In the graph on the right below, sketch the frictional force exerted on the box by the surface as a function of time. Explain.
Solution
0 0

A block of mass m sits on top of a slab of mass 4 m. The slab rests on a frictionless floor. The coefficient of static friction between the slab and the block is 0.60 whereas the coefficient of kinetic friction is 0.40 . The block is now pulled by a horizontal force of magnitude F to the left. (a) It is observed that the blocks move together as a system. In this case, is the friction between the contact surfaces of the block and the slab static friction or kinetic friction? Justify. (b) If m = 10 kg, what is the maximum value of the applied horizontal force, F for which the slab and the block move together as a system? (c) If the applied horizontal force is increased beyond the value you determined in part (b), describe what would be the change, if any, in the motion of the block and slab. Explain. (d) For F = 100 N, what would be the accelerations of the slab and the block individually if you expect them to be different?
Solution
0 0

A 4.540 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.505 and the coefficient of kinetic friction is μk = 0.205. At time t = 0, a force F = 13.8 N is applied horizontally to the block. State the force f(t) of friction applied to the block by the table at times t = 0 and t > 0. f(0) = N f(t > 0) = N Consider the same situation, but this time the external force F is 27.9 N. Again, state the force of friction acting on the block at times t = 0 and t > 0. f(0) = N f(t > 0) = N
Solution
0 0