# I. Mechanical energy is defined as the sum of which of the following? a. kinetic, potential, and...

## Question:

I. Mechanical energy is defined as the sum of which of the following?

a. kinetic, potential, and radiant energy.

b. kinetic, potential, and nuclear energy.

c. all forms of kinetic energy.

d. kinetic and all forms of potential energy.

II. An object that revolves about a single axis at constant speed has_____.

a. centripetal acceleration.

b. tangential speed.

c. uniform circular motion.

d. all of the above.

## Mechanical Energy, Circular Motion:

The word 'mechanical' is related to machines. Mechanical energy is related to the energy exchanged by the action of forces. The mechanical energy of a system is changed when a net external force performs work on the system.

The motion along a circle is called circular motion. The motion along circle can occur at a constant speed or at a varying speed. In either case, the object is continuously accelerated so that its velocity changes in such a way that remains on the circular path.

## Answer and Explanation: 1

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Mechanical energy is defined as the sum of the kinetic energy and potential energy. The kinetic energy is the energy due to motion while...

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Chapter 3 / Lesson 23Define uniform circular motion. Define centripetal force and centrifugal force and identify the formula for uniform circular motion.

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