1.) A force can cause a resting object to more or cause a moving object to accelerate by changing its speed or direction.
2.) Static, sliding, rolling, and fluid friction.
3.) Gravity causes objects to accelerate downward, whereas air resistance acts in the direction opposite to the motion an reduces acceleration
4.) Earth's gravity acts toward toward the center of the earth.
5.) The combination of an initial forward velocity and the downward verticle forcee of gravity causes the ball to have a curved path.
6.) Static is the strongest, followed by sliding, then rolling.
7.) The shape it has causes the air to move in a weird pattern, making some of it fall faster than the other, therefor making it move in a different direction.
8.) The coin that was affeced wtih force will hit the floor first.