Name the four fundamental fores at work inside an atom. Tell what each one does.

Four fundamental forces are gravitational, electromagnetic, strong, and weak.

Explanation:

The gravitational and electromagnetic interactions, which produce significant long-range forces whose effects can be seen directly in everyday life and the strong and weak interactions, which produce forces at minuscule, subatomic distances and govern nuclear interactions.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

15.3 cos 65 degrees trig