In the tennis court, Joshua hits a tennis ball with his racquet vertically up from a height of 1.20 m above the floor. The ball reached the floor after 1.50 seconds. Assuming the value of g to be 10 m/s/s, find (a.) the speed with which Joshua hits the ball, (b.) the greatest height above the floor reached by the ball, (c.) the speed of the ball on reaching the floor; and (d.) how high the ball bounces if it loses a quarter of its speed on hitting the floor.

In the tennis court, Joshua hits a tennis ball with his racquet vertically up from a height of 1.20 m above the floor. The ball reached the floor after 1.50 seconds. Assuming the value of g to be 10 m/s/s, find (a.) the speed with which Joshua hits the ball, (b.) the greatest height above the floor reached by the ball, (c.) the speed of the ball on reaching the floor; and (d.) how high the ball bounces if it loses a quarter of its speed on hitting the floor.

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