A satellite travels with a constant speed |v| as it moves around a circle center

Question

A satellite travels with a constant speed |v| as it moves around a circle centered on the earth. How much work is done by the gravitational force F on the satellite after it travels halfway around the earth in time t? It cannot be determined. W = 0 W = f|v|c W = f|v|t The engine of a 1000 kg sports car rotates the tires, creating a forward pushing force F on the tires of the car that varies as a function of distance. The force is shown below. If the car starts at rest, what is the speed of the car after traveling 500 meters? 0 m/s 71 m/s 100 m/s 141 m/s 200 m/s

Explanation / Answer

1) work done W = 0

It is because gravitational force is perpendicular to the notion

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