Physics

posted by .

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is 0.10.

Find (a) the force exerted by the worker, (b) the work done by the worker on the block, (c) the work done by gravity on the block, (d) the work done by the surface of the incline on the block, (e) the work done by the resultant force on the block, and (f) the change in kinetic energy of the block.

I solved a and b, and I get them, but I'm stuck conceptually on the last few parts. On c, my biggest issue is that I think I'm confusing this situation to one where a block attached to a string is lowered (i.e. negative work is done on the block.)

Does (d) even matter since it's not the incline pushing the block down it? Or does friction play a part here?

For (e), if Fnet is 0 (since all the forces have to be 0 for there to be constant speed) does that mean this question is irrelevant?

...I can figure (f) out on my own.

I don't want answers, just...some conceptual help on this one.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A block slides down a 10 angled incline at a constant speed. what is the coefficient of sliding friction between the blocks surface and the incline?
  2. physics

    need help with this question please a 1kg block starts at rest and slides down the incline. the coefficient of friction between the incline and the block is 0.1. The height of the incline is 2m, and the angle is 30 degrees. use energy …
  3. physicsssss

    two blocks are connected over a pulley. The mass of block A is 10 kg and the coefficient of kinetic friction between A and the incline is 0.24. Angle èof the incline is 30°. Block A slides down the incline at constant speed. What …
  4. Physics

    In loading a fish delivery truck, a person pushes a block of ice up a 200 incline at constant speed. The push is 150N in magnitude and parallel to the incline. The block has a mass of 35.0 kg. What is the force of kinetic friction …
  5. physics

    A small block with mass 0.308 kg is sliding down a frictionless ramp that is inclined at an angle of 53.1° above the horizontal. Assume g = 9.80 m/s2. (a) As the object slides down the incline, what is the magnitude of the normal …
  6. Physics

    A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and incline is 0.10. …
  7. Physics

    A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is …
  8. Physics

    A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is …
  9. physics

    In the figure, two blocks are connected over a pulley. The mass of block A is 7.9 kg and the coefficient of kinetic friction between A and the incline is 0.18. Angle θ of the incline is 41°. Block A slides down the incline at …
  10. Physics

    Two blocks are connected over a massless, frictionless pulley. The mass of block 2 is 8.00 kg, and the coefficient of kinetic friction between block 2 and the incline is 0.250. The angle θ of the incline is 28.0°. Block 2 slides …

More Similar Questions