If gravity is the only force present, what is the total mechanical energy of a

rock falling off a cliff at a time when its potential energy is 500 J and its

kinetic energy is 600 J?

A. 500 J

B. 100 J

C. 600 J

D. 1,100 J

Question

Physics

Atticus

14 March, 19:33

If gravity is the only force present, what is the total mechanical energy of a

rock falling off a cliff at a time when its potential energy is 500 J and its

kinetic energy is 600 J?

A. 500 J

B. 100 J

C. 600 J

D. 1,100 J

+5

Answers (1)

Know the Answer?

Abbie Price · Answer 1

(D) is correct option.

Explanation:

At a particular time, the potential energy of a rock is 500 J and its kinetic energy is 600 J.

It is required to find the mechanical energy of the rock. Mechanical or total energy is the sum of kinetic and potential energy. So,

TE = K + P

TE = 500 J + 600 J

TE = 1100 J

So, the total mechanical energy of a rock is 1100 J. Hence, the correct option is (D).

If gravity is the only force present, what is the total mechanical energy of arock falling off a cliff at a time when its potential energy is 500 J and itskinetic energy is 600 J?A. 500 JB. 100 JC. 600 JD. 1,100 J

If gravity is the only force present, what is the total mechanical energy of a

rock falling off a cliff at a time when its potential energy is 500 J and its

kinetic energy is 600 J?

A. 500 J

B. 100 J

C. 600 J

D. 1,100 J