A box slides down a plank of length d that makes an angle of θ with...

A box slides down a plank of length d that makes an angle of θ with the horizontal as shown. μ_k is the kinetic coefficient of friction and μ_s is the static coefficient of friction.

a) Enter an expression for the minimum angle θ (in degrees) the box will begin to slide.

b) Enter an expression for the nonconservative work done by kinetic friction as the block slides down the plank. Assume the box starts from rest and θ is large enough that it will move down the plank.

c)

For a plank of any length, at what angle θ (in degrees) will the final speed of the box at the bottom of the plank be 0.75 times the final speed of the box when there is no friction present? Assume μ_k = 0.39.

Expert Solution

In this question we have to find different parameters using the concept of motion of block on incline plane.

genius_generous answered 2 years ago

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