A ball is dropped on to the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, what is the average acceleration during contact ?

Explanation

To solve the problem of finding the average acceleration of the ball during its contact with the floor, we can follow these steps:

### Step 1: Determine the initial velocity just before impact
When the ball is dropped from a height of 10 m, we can use the equation of motion to find the velocity just before it hits the ground. The equation we will use is:

\[ v^2 = u^2 + 2gh \]

Where:
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