Object a of mass m is released from height h, whereas object b of mass 0.5m is released from height 2h. what is the ratio of the velocity of object a to that of object b immediately before they hit the ground?
a. 1: 2
b. 1.41 : 1
c. 1: 1.41
d. 1: 4
e. 1: 1

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?

As the distance from a magnet increases, what happens to the magnet force?

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?