Question

a 4 kilogram cat is resting on top of a bookshelf that is 3 meters high what is the cats gravitational potential energy relative to the floor if the acceleration due to gravity is 9.8m/s A.7j B. 29j C.12j D.118j

Answer 1

GPE = mgh

Where GPE is gravitational potential energy (J), m is the mass ob the object (kg), g is acceleration due to gravity (m/s²) and h is the height (m)

m = 4 kg
g = 9.8 m/s²
h = 3 m

By substitution,
GPE =  4 kg x 9.8 m/s² x 3 m
        = 117.6 J
        ≈ 118 J

Hence, the answer is D