A racquet ball with 0.500 kg mass is moving toward the wall at a speed of 20.0 m/s and at an angle of 35 degree with respect to the horizontal. The ball makes a perfectly elastic collision with the solid, frictionless wall and rebounds at the same angle with respect to the horizontal. The ball is in contact with the wall for a time interval of 0.0850 s. What is the average force on the ball during die collision process? 96.4 Ni -135 Nj 67.5 Nj -193 Ni 135 Ni
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