How much energy does a 50 kg rock have if it is sitting on the edge of a 15 m cliff?
7350 j
750 j
5625 j
18750 j

7350 J

Explanation:

The gravitational potential energy of the rock sitting on the edge of the cliff is given by:

where

m is the mass of the rock

g is the gravitational acceleration

h is the height of the cliff

In this problem, we have

m = 50 kg

g = 9.8 m/s^2

h = 15 m

Substituting numbers into the formula, we find:

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.