Question

In an inertial frame, a free particle:
1. is accelerated
2. is decelerated
3. moves with uniform velocity or is at rest
4. is either accelerated or decelerated

Answer 1

Correct Answer - Option 3 : moves with uniform velocity or is at rest

Explanation:

The frame of reference: If we are observing any moving body or anybody at rest with respect to any moving object or from any object at rest then the object is called a frame of reference.

There are two types of frame of reference:

Inertial frame of reference:

• The frame of reference having zero acceleration is called the Inertial frame of reference.
• This frame of reference will be either at rest or will be moving with a constant velocity.
• Newton’s law is valid in this frame of reference.
• Example- A bus moving with constant velocity.

The non-inertial frame of reference:

• The frame of reference having non-zero acceleration is called a non-inertial frame of reference.
• Newton’s law is not valid in this frame of reference.
• For example: If we are observing an object from a freely falling object then this will be a non-inertial frame of reference because the freely falling body has some acceleration.