Which of the following persons is in an inert | vedclass

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(C) An inertial frame of reference is a frame in which Newton's first law of motion holds true. This means an object in this frame remains at rest or

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$A$ driver in a bus which is moving with constant velocity.

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(C) An inertial frame of reference is a frame in which Newton's first law of motion holds true. This means an object in this frame remains at rest or moves with a constant velocity if no net external force acts on it. $1$. $A$ pilot in an aeroplane taking off is accelerating,so it is a non-inertial frame. $2$. $A$ child on a merry-go-round is undergoing circular motion,which involves centripetal acceleration,making it a non-inertial frame. $3$. $A$ driver in a bus moving with constant velocity has zero acceleration,making it an inertial frame. $4$. $A$ man in a train slowing down is undergoing deceleration (negative acceleration),making it a non-inertial frame. Therefore,the correct option is $C$.

Which of the following persons is in an inertial frame of reference?

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