Question

a car is coasting on a road and comes to the bottom of a hill. it has 10 units of kinetic energy. what is the total energy? 10 units 5 units 8 units 6 units

Explanation:

Step1: Determine potential energy at bottom of hill

At the bottom of the hill, the height \( h = 0 \). Using the formula for gravitational potential energy \( E_p=mgh \), when \( h = 0 \), \( E_p = 0 \) units.

Step2: Calculate total energy

The total mechanical energy \( E\) is the sum of kinetic energy \( E_k\) and potential energy \( E_p\). So \( E=E_k + E_p\). Given \( E_k=10\) units and \( E_p = 0\) units, then \( E=10+0\).

Answer:

10 units