9. A spring with a constant of 250 N/m is compressed .73 meters. The spring is sitting parallel to a frictionless tabletop with a 1.5 kg block of wood pushed into it at point A. What will be the maximum speed of the block of wood at point B when the spring is allowed to spring?
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0 66.6 m/s
O 9.4 m/s
O 21.2 m/s

Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.