A stone is dropped from the top of a tower of height 100 m. The stone penetrates in the sand on the ground through a distance of 2m. Calculate the retardation of the stone.

Explanation

To solve the problem of calculating the retardation of the stone that penetrates into the sand after being dropped from a height of 100 m, we can follow these steps:

### Step 1: Determine the velocity of the stone just before it hits the ground.

The stone is dropped from a height of 100 m. The initial velocity (u) is 0 m/s, and we can use the equation of motion:

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

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