Question

if a bean of mass 2.0 g jumps 1.0 cm from your hand into the air, how much potential energy has it gained in reaching its highest point? What is its speed as the bean lands back in the palm of your hand?

Answer 1

PE gained=mass*g*heightinmeters mass is in kg g=9.8Nt/kg

find speed from
1/2 mass*v^2=mass*g*heightfell

use kg, meters, seconds as units.