What is the KE of a .10 kg tennis ball approaching the racket at 20 m/s?
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Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a. true or b. false