describe how the piece of chalk in the image may be affected by static friction, sliding friction, fluid friction, and rolling friction. which type of friction is likely to produce the greatest amount of force on the chalk?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.