Question

Mechanical energy is conserved in the presence of which of the following types of forces?Select all that apply. A- electrostatic B- frictional C- magnetic D- gravitational

Answer 1

Answer: electrostatic and gravitational force

Mechanical energy remains constant (conserved) if only conservative forces act on the particles.

In this sense, the following forces are conservative:

-Gravitational

-Elastic

-Electrostatics

While the Friction Force and the Magnetic Force are not.

According to this, mechanical energy is conserved in the presence of electrostatic and gravitational forces. Therefore the correct options are A and D.

Answer 2

A- electrostatic

C- magnetic

D- gravitational

Step-by-step explanation:

As per mechanical energy conservation law we can say that when all conservative forces are present on the system then mechanical energy is always conserved

So here we have to choose all such options which will give conservative forces only

so correct answers are

A- electrostatic

C- magnetic

D- gravitational