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Which of the following statements is/are correct? a) The frame of reference in which newton’s law holds true is inertial frame of reference. b) A man falling freely in air is assumed as non-inertial frame of reference.

Which of the following statements is/are correct? a) The frame of reference in which newton’s law holds true is inertial frame of reference. b) A man falling freely in air is assumed as non-inertial frame of reference. Correct Answer Both a and b are correct

Concept:

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 frame of reference.


There are two types of frame of reference:

Inertial frame of reference:

1) The frame of reference having zero acceleration is called Inertial frame of reference.

2). This frame of reference will be either in rest or will be moving with a constant velocity.

3) The newton’s law is valid in this frame of reference.

Non-inertial frame of reference:

1) The frame of reference having non-zero acceleration is called non-inertial frame of reference.

2) The newton’s law is not valid in this frame of reference.

For example: If we are observing any object from a freely falling object then this will be a non-inertial frame of reference because the freely falling body has some acceleration.

Explanation:

  • The newton’s law is valid in inertial frame of reference. So statement a is correct.
  • If we are observing any object from a freely falling object then this will be a non-inertial frame of reference because the freely falling body has some acceleration. Here statement b is also correct. So option 3 is correct.

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