- A ball is thrown at a wall 50 meters away. It takes the ball 5 seconds to get to the wall it is thrown at What is the average speed of the ball? SPEED

Modify the equation fδt=δ (mv) to find the force of friction.

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?

Arrange the images in order to show how lake-effect snow occurs.