A rocket is launched vertically from the surface of Earth and is carrying a heavy load of cargo. Earth’s radius is RE, and the weight of the cargo on Earth’s surface is W. How far from the center of Earth does the rocket need to be so that the weight of the payload is W/4? Re
2Re
4Re
16Re

What is the measurement of how fast an object moves relative to a reference point?

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?

Current from a charged capacitor lights a bulb. as time goes on the brightness of the