A100-kg athlete is performing a vertical leap to test his leg strength. he leaves the ground at 3.20 m/s, zooms upward to some maximum altitude, and then returns to the ground. as he lands, he bends his legs and crouches down, so that he moves 30 cm downward as he comes to a stop. what average force did the athlete’s legs exert on the ground as he landed?

Atank is filled with an ideal gas at 400 k and pressure of 1.00 atm . part a the tank is heated until the pressure of the gas in the tank doubles. what is the temperature of the gas?

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

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.