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Q. No.At a metro station, a girl walks up a stationary escalator in time \(t_1\) . If she remains stationary on the escalator, then the escalator take her up in time \(t_2\). The time taken by her to walk up on the moving escalator will be:
1. \(\left(t_1+t_2\right) / 2 \)
2. \(t_1 t_2 /\left(t_2-t_1\right) \)
3. \(t_1 t_2 /\left(t_2+t_1\right) \)
4. \(t_1-t_2\)
1. \(\left(t_1+t_2\right) / 2 \)
2. \(t_1 t_2 /\left(t_2-t_1\right) \)
3. \(t_1 t_2 /\left(t_2+t_1\right) \)
4. \(t_1-t_2\)
Subtopic: Â Relative Motion in One Dimension |
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