Problem 1.62

A small body was launched up an inclined plane set at an angle \(\alpha=15^{\circ}\) against the horizontal. Find the coefficient of friction, if the time of the ascent of the body is \(\eta=2.0\) times less than the time of its descent.

k=\left[\left(\eta^{2}-1\right) /\left(\eta^{2}+1\right)\right] \tan \alpha=0.16

The Fundamental Equation of Dynamics