Two friends Alexa and Siri are sitting inside a train which is moving at a constant speed. With respect to Alexa, Siri

is at rest

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is in uniform motion

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is in non-uniform motion

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can be at rest or in motion, depending on the speed of the train

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Solution

The correct option is A
is at rest

With respect to Alexa, the position of Siri will not change with time. Hence, Siri is at rest with respect to Alexa.

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Which of the following objects is/are at rest with respect to you if you are sitting in a moving train?

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