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:

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.