The maximum height that an average person can jump from a crouched start is about 60 cm. By how much does the gravitational potential energy increase for a 72 kg person in such a jump?

423.36 J

Explanation:

Change in gravitational potential energy = mgh where m is the mass of the displaced object g is the acceleration due to gravity and h is the displacement along a plane parallel to gravity vector.

From the question. m = 72kg, h=60cm=0.6m

g=9.8m/s²

Δ PE = 72kg*9.8m/s²*0.6m

=423.36 J