A person jumps from the roof of a house high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of . If the mass of his torso (excluding legs) is , find the average force exerted on his torso by his legs during deceleration.

A pair of fuzzy dice is hanging by a cord from your rearview mirror. While you are decelerating at a constant rate from to rest in , what angle does the string make with the vertical and in what direction (toward or away from the windshield)?

Which of these is necessary for there to be a non-zero net force?

Which of these is not an example of Newtonian mechanics?

A ball rests on a flat table. What is the normal force exerted on the ball by the table?

A block is pushed with newtons of force. What other information do we need in order to find the acceleration of the block?

A orange falls from a tree. What is the force of gravity on the orange?

Suppose your car was stuck deep in the mud and you wanted to use the method above to pull it out. What force would you have to exert perpendicular to the center of the rope to produce a force of 12,000 N on the car if the angle that the rope is bent from the horizontal is 3 degrees?

A ball rests on a flat table. What is the normal force exerted on the ball by the table?

Two dogs pull on a bone in opposite directions. If the first dog pulls with a force of to the left and the other pulls with a force of in the opposite direction, what will be the acceleration on the bone?