Question

Asked Jan 24, 2020

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A ball is dropped from a height of 90 m on a floor. At each collision with the floor, the ball loses one tenth of its speed. Plot the speed-time graph of its motion between t = 0 to 12 s.

Step 1

Let the height from which the ball is initially dropped be denoted by *h*_{1}.

Use the third kinematic equation for the free – fall of the ball where the initial speed *u* of the ball is taken to be zero.

Step 2

Here *v*_{1 }is the initial speed of the ball after initial fall of the ball from height *h*_{1 }

Substitute 9.8 m/s^{2 }for *g* and 90 m for *h* and solve for *v*_{1} as,

Step 3

The time *t*1 taken by the ball to reach the ground from height *h*1 is calculate...

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