A 63.4 kg high jumper has 1170 J of PE as he goes over the bar. How high is he? (Unit = m)

1.88 meters

Explanation:

Potential energy = Mgh

Where m = mass

g = acceleration due to gravity

h = height

Given PE = 1170J

M = 63.4kg

g = 9.8m/s^2

h = ?

Therefore

1170 = 63.4 x 9.8 x h

1170 = 621.32 x h

Divide both sides by 621.32

1170/621.32 = 621.32 x

h / 621.32

1.88 = h

h = 1.88 meters