Question

A body is launched up an inclined plane with coefficient of friction \(k\) which makes an angle \(\alpha\) with the horizontal. If the time of ascent is \(\eta\) times less than the time of descent, then find out the coefficient of friction.

Answer 1

@iambatman

Answer 2

Obligatory "I hate you, Irodov" before we start thinking about the problem.

Answer 3

Let's first analyse the forces on the body when it goes up the inclined plane.