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A person walks up a stalled escalator in . He is carried in , when standing on the same escalator which is now moving. The time he would take to walk up the moving escalator will be
(a)
(b)
(c)
(d)

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Important Questions on Kinematics
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A jet air plane travelling with a speed of ejects its products of combustion with a speed of relative to the jet plane. The speed of the latter with respect to an observer on the ground is

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A train of length is running towards north at a speed of . A parrot flies at a speed of towards south parallel to the railway track. The time taken by the parrot to cross the train is equal to

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Two trains each long, are travelling in opposite directions with respective velocities and . The time of crossing is

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Two cars are moving in the same direction with the same speed of . They are separated by . What is the speed of a car moving in the opposite direction if it meets the two cars at an interval of minute ?

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A stone is thrown upwards and it rises to a height of . The relative velocity of the stone with respect to the earth will be maximum at

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A bus starts from rest moving with an acceleration of . A cyclist, behind the bus starts simultaneously towards the bus at . After what time will he be able to overtake the bus

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A train is moving towards East with a speed . A person is running on the roof of the train with a speed against the motion of train. Velocity of the person as seen by an observer on ground will be :

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A motorcycle is moving with a velocity of ahead of a car moving with a velocity of in the same direction. What is the relative velocity of the motorcyde with respect to the car?
