Question

4. How much gravitational potential energy does a bird with a mass of 0.62 kg have it is 11.3 m in the air ?

Answer 1

By the definition of the gravitational potential energy, we have:

$$E_p=mgh=0.62\ kg\cdot9.8\ \dfrac{m}{s^2}\cdot11.3\ m=68.6\ J.$$

Answer:

$E_p=68.6\ J.$