A reference frame attached to a train It is a good inertial frame if it is moving at a fixed speed around a curve

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Quizplus · Accepted Answer

A reference frame attached to a train moving at a fixed speed around a curve is not an inertial frame because it is undergoing centripetal acceleration, which deviates from the definition of an inertial frame where only constant velocity (straight-line motion) or rest is allowed without any acceleration.

A Reference Frame Attached to a Train It Is a Good