Question

A large crate with mass m rests on a horizontal floor. The static and kinetic coefficients of friction between the crate and the floor are $\mu_s$ and $\mu_k$, respectively. A woman pushes downward on the crate at an angle θ below the horizontal with a force $\vec F$ on the crate at an angle θ below the horizontal.
(a) What magnitude of force $\vec F$ is required to keep the crate moving at constant velocity?
(b) If $\mu_s$ is greater than some critical value, the woman cannot start the crate moving no matter how hard she pushes. Calculate this critical value of $\mu_s$.

Answer 1

Answer:

Explanation:

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