A truck of mass 2000 kg climbs up hill of height 250 m . It then moves on a straight road on the top of hill with the speed of 20 m/s . Calculate the potential energy gained by the truck and its total mechanical energy when moving on the top of the hill .

Explanation

To solve the problem, we need to calculate the potential energy gained by the truck when it climbs the hill and then find the total mechanical energy when it is moving on top of the hill.

### Step-by-Step Solution:

1. **Calculate the Potential Energy (PE):**
The formula for potential energy is given by:
\[
PE = mgh
...