A 0.35 kg ball moving in a circle at the end of a string has a centripetal acceleration of 5 m/s^2. What is the magnitude of the centripetal force exerted by the string on the ball to produce this acceleration?

A sharpshooter fires a rifle while standing with the butt of the gun against her shoulder. If the forward momentum of a bullet is the same as the backward momentum of the gun, why isn't it as dangerous to be hit by the gun as by the bullet?

What are some 2 safety Equipment

A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3.00 m long. What is the tension in each rope when the 700-N worker stands 1.00 m from one end?

What allows a tightrope walker to walk across the rope? tension air resistance friction magnetic force Isabella pushes a box with a force of 20 N. It accelerates at 2 m/s/s. What is the mass of the box? 10 kg 40 kg 22 kg cannot be determined

What is the height of a building (in meters) if it takes a rock 3.8 seconds to drop from its roof?

In which of the following are action and reaction forces involved? A. when a tennis racket strikes a tennis ball B. when stepping from a curb C. when rowing a boat D. all of the above

What happens to the entropy of a piece of wood as it is burned? a. It increases. b. It decreases. c. It stays the same. d. SubmitR

A 15-foot ladder is leaning against a house with the base of the ladder 4 feet from the house. How high up the house does the ladder reach? Round to the nearest tenth of a foot.

The electron structures of atoms are not involved in the emission of:

A boulder with a mass of 2,500 kg rests on a ledge 200m above the ground. What is the boulder's GPE