Numerical problems Calculate
(a)Increase in the P.E. of a boy of mass 50kg when be moves from a height of 5 m to 8 m (g= 10 `ms^(-1)`)

Explanation

To solve the problem of calculating the increase in potential energy (P.E.) of a boy moving from a height of 5 m to 8 m, we can follow these steps:

### Step 1: Understand the formula for potential energy
The formula for potential energy (P.E.) is given by:
\[ \text{P.E.} = mgh \]
where:
- \( m \) = mass of the object (in kg)
- \( g \) = acceleration due to gravity (in \( m/s^2 \))
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