Chapter 4.1, Problem 3aT

A force of magnitude $F_o$ is applied to point M as shown.

The force is always at a right angle to the bar.

For each of the following cases, determine whether the angular acceleration would be in a clockwise or counterclockwise sense.

• The bar was initially at rest. (Hint: Consider $\Delta \stackrel{\to }{\omega }$ .)

The bar was spinning at a rate before the force was applied.

Does your answer for the angular acceleration depend on whether the bar was originally spinning clockwise or counterclockwise? Explain.