Explain the terms: inertial frame of reference and non-inertial frame of reference.
Answers
At some point in your life, you've probably been on a form of public transportation. It might have been a bus, metro, train, plane, or even something else. Often we share these rides with other people. From your point of view in the vehicle, these people are sitting or standing still. However, to a bystander standing still outside the vehicle, you and your fellow passengers are moving at a faster velocity. We can call these two points of view two different frames of reference. In physics, we can classify frames of reference by two main types: inertial and non-inertial.
Inertia is the property of matter in which an object that is at rest wants to remain at rest, and an object that is moving wants to remain moving in a straight line unless another force acts upon it. Likewise, an inertial frame of reference is a reference frame in which an object stays either at rest or at a constant velocity unless another force acts upon it. When a body does not seem to be acting in accordance with inertia, it is in a non-inertial frame of reference or accelerating.
Inertial Reference Frames are reference frames in which Newton first law of motion holds i.e. an object at rest and an object in motion remains in motion unless acted by a net force. An inertial reference frame is either at rest or moves with a constant velocity.
A non inertial reference frame is a reference frame that is accelerating, either in linear fashion or rotating around some axis.
Examples : Label the type of reference frames :
A train moving with constant velocity. (Inertial)
A rotating merry-go-round.(Non Inertial)
A turning car with constant speed (Non Inertial)
The rotating Earth (Non Inertial)
