Question

A puck slides down an icy incline of height 4.00 m and slope distance 5.00 m. If the puck started from rest at the top, what is it speed at the bottom?

Answer 1

Answer:

constant speed

So here friction force on the block is counter balanced by weight along the incline plane while it is sliding down

mgsinθ=F

f

now when block is pushed up the plane with initial speed "v"

then it has two forces along the incline plane opposite to the velocity

1. friction force

2. component of weight along the incline

so net force along the incline opposite to velocity