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A person strolls inside a train with a velocity of 1.0 m s–1 in the direction of motion of the train. If the train is moving with a velocity of 3.0 m s–1, calculate his (a) velocity as seen by passengers in the compartment, and (b) velocity with respect to a person sitting on the platform. |
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Answer» a)1 ms⁻¹b)2 ms⁻¹Explanation:a) since passenger is on the TRAIN he can directly see the person who STROLLS hence, vₐ , passenger = 0 ms⁻¹ vᵇ , the person who strolls = 1 ms⁻¹ vᵇₐ = VB - va = 1-0 = 1ms⁻¹b) the observer is sitting on the platform and the person INSIDE the train who strolls as well the train MOVE in the positive direction therefore, vb , the velocity of the train = 3ms⁻¹va , the velocity of the person who strolls= 1ms¹ vᵇₐ = vb - va = (+3)-(+1) = 2ms⁻¹ |
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