After a 0.220-kg rubber ball is dropped from a height of 1.80 m, it bounces off

Question

After a 0.220-kg rubber ball is dropped from a height of 1.80 m, it bounces off a concrete floor and rebounds to a height of 1.20 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. magnitude Incorrect: Your answer is incorrect. Your response differs from the correct answer by more than 10%. Double check your calculations. kg · m/s direction Correct: Your answer is correct. (b) Estimate the time the ball is in contact with the floor to be 0.03 seconds. Calculate the average force the floor exerts on the ball. magnitude Incorrect: Your answer is incorrect. Your response differs from the correct answer by more than 10%. Double check your calculations. N direction Correct: Your answer is correct.

Explanation / Answer

velocity of ball before it strikes the floor:
initial gravitational potential energy = final kinetic energy
mgh = (1/2)mv

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