Question

Maria is holding a ball from a height of 2.3 m that has the potential energy of 17.1 J, calculate the mass of the ball

Answer 1

use the formula for gravitational potential energy, $e_{p \: = \: }mgh$

17.1 J = m × 9.8 × 2.3 m
17.1 J = 22.54m

m = 17.1 J ÷ 22.54
m = 0.7586512866 kg
m = 0.759 kg