Question

5. An object traveling with a speed of 10 m/s slides on a horizontal floor. How far will it travel before coming to rest if the coefficient of friction is 0.30?

Answer 1

$F_f=ma\to \mu N=ma\to\mu mg=ma\to a=\mu g=0.3\cdot9.81=2.943\ (m/s^2)$

$s=\frac{v^2}{2a}=\frac{10^2}{2\cdot2.943}\approx17 \ (m)$ . Answer