Aball rolls off a desk at a speed of 3.0 m/s and lands 0.40 seconds later. a) how far from the base of the desk does the ball land b) how high is the desk? c) what is the speed of impact?

Part a)

Part b)

Part c)

Explanation:

Part a)

Speed of the ball = 3.0 m/s

time taken by the ball to hit the floor = 0.40 s

so the total distance moved by the ball in horizontal direction is given as

Part b)

The height of the desk is same as the displacement of ball in vertical direction during its free fall

so it is given as

Part c)

In x direction the velocity of ball will remains the same

in Y direction the velocity of ball is given as

so the speed of the ball is given as

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