Question

Greta jumps up 2 feet into the air. Her potential energy is 60 Joules. Her kinetic energy is 40 Joules. What is the total mechanical energy?

A. 1,200 Joules

B. 800 Joules

C. 100 Joules

D. 200 Joules


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Answer 1

The correct answer option is C. 100 Joules.

Explanation:

We are given that Greta jumps up 2 feet into the air. Her potential energy is 60 Joules while her kinetic energy is 40 Joules.

We are to calculate her total mechanical energy which will be the sum of her potential energy and her kinetic energy.

So we simply need to add the two given values of the energies.

Total mechanical energy = 60 + 40 = 100 Joules

Answer 2

The mechanical energy will be 100 Joules

Explanation:

Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both.

So

Mechanical energy = 60J + 40J

Mechanical energy = 100 Joules