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Which has a greater kinetic energy, a 5 kg mass traveling at 30 m/s or a 2.5 kg mass traveling at 60m/s?

My sister at a height of 25 m has a potential energy of 22,500 Joules. What is her mass?

The mass of a lamb that weights 110 N is about

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is greater on the

A 10 kg brick and a 1 kg book are dropped in a vacuum. The force of gravity on the 10 kg brick is

A person is attracted toward the center of the earth by a 500 N gravitational force. The force of attraction of the earth toward the person is

A bullet is fired horizontally with an initial velocity of 300 m/s from a tower that is 20 m high. If air resistance is negligible, the horizontal distance the bullet travels before hitting the ground is

If you are travelling at a speed of 55 miles/hour, what is your speed in meters/second?There are 1609 meters in a mile.

A rock is thrown upwards at an angle of 45 degrees with respect to the horizontal. As it rises, its velocity in the horizontal direction

If it takes 6 seconds for a stone to fall to the bottom of a well. How deep is the well?