A ball is thrown horizontally from a 20 m-high building with a speed of 9.0 m/s .

A baseball player uses a very massive golden bat to hit a rubber ball off of a tee. If the bat is moving 20 m/s when it hits the ball, what will be the speed of the ball as it leaves the bat?

Dae-hyun, a man of mass 72 kg, steps from a table 92 cm to the floor below. Assume that his velocity is zero as he leaves the table. As he lands, he bends his knees so that he decelerates to a final speed of zero over a distance of 35 cm. (a) What is Dae-hyun's speed just as he starts to hit the floor? Type your answer here (b) As he decelerates, what is the magnitude of the force exerted on him by the floor? Assume constant acceleration. x10 to the power of Type your answer here Type your answer here (You may need to involve some kinematics to solve this one!) m/s N on Dae-hyun.

At the base of a hill, a 90 kg cart drives at 13 m/s toward it then lifts off the accelerator pedal). If the cart just barely makes it to the top of this hill and stops, how high must the hill be?