Answer to Question #171282 in Physics for Sheila karimu

Question

A bird is sitting in a tree 4m in the air. It has 220 J energy. How massive is the bird?

Answer 1

$$PE=mgh,$$ $$m=\dfrac{PE}{gh}=\dfrac{220\ J}{9.8\ \dfrac{m}{s^2}\cdot4\ m}=5.61\ kg.$$