Question

a object with 100 N weights is raised to a height of 15m. Find the potential energy possessed by the object at that height. Also find the new potential energy:
a. If the same object is raised half of its original height.
b. If the same object is raised to three times of its original height?

Answer 1

New PE = mgh = (100 N)(15 m) = 1500 J = 1.5 kJ.

a. h′ = h/2 = 15/2 m

So, PE′ = (100 N)(15/2 m) = 750 J

b. h″ = 3h = 45 m

So, PE″ = (100 N)(45 m) = 4500 J = 4.5 kJ.