7. A ball is dropped from a person's hand and falls to Earth. Identify an action-reaction pair, and compare the forces exerted by each object.

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?