A student tied a small stone at one end of the string and whirled it above his head in a circular path by keeping the other end of the string in his hand. He just let it go off suddenly. The stone would have

Idon’t quite understand this problem

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

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.