Agolf ball is struck at ground level. the speed of the golf ball as a function of the time is shown in the figure, where t = 0 at the instant the ball is struck. the scaling on the vertical axis is set by va= 21 m/s and vb= 32.3 m/s. (a) how far does the golf ball travel horizontally before returning to ground level? (b) what is the maximum height above ground level attained by the ball?

Acrow drops a 0.11kg clam onto a rocky beach from a height of 9.8m. what is the kinetic energy of the clam when it is 5.0m above the ground? what is its speed at that point?

How is the gravitational force related to the distance between two objects?

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?