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A person walks up a stalled escalator in...

A person walks up a stalled escalator in 90 s. When standingon the same escalator, now moving, he is carried in 60 s.The time it would take him to walk up the moving escalator will be:

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3
By observation, for equal interval of time the magnitude of slope of line in x-t curve is greatest in interval 3.
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ALLEN -MOTION IN A PALNE-EXERCISE-04[A]
  1. A person walks up a stalled escalator in 90 s. When standingon the sam...

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  2. A train accelerates from rest at a constant rate α a for distance x(...

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  3. A car runs at constant speed on a circular track of radius 10m. taking...

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  4. Position of a particle moving along x-axis is given by x=2+8t-4t^(2). ...

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  5. A particle is thrown up vertically with a speed v(1) in air . If takes...

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  6. A jet airplance travelling at the speed of 500 km ^(-1) ejects its pr...

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  7. A particle of mass 3 kg moves under a froce of [4 hati + 8 hatj+ ...

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  8. Figure shows the displacement of a particle going along the X-axis as ...

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  9. A car starts from erest accelerates uniform by for 4 second and then m...

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  10. The fig. shows the displacement time graph of a particle moving on a s...

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  11. A person walks along an east-west street and a graph of his displaceme...

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  12. In the following velocity-time graph of a body, the distance and displ...

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  13. A rocket is fired vertically from the ground. It moves upwards with a ...

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  14. A body is projected vertically upward from the surface of the earth, t...

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  15. A body is projected upwards with a velocity u. It passes through a cer...

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  16. A rocket is projected vertically upwards and its time velocity graph i...

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  17. In the previous question, the height attained by the rocket before dec...

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  18. In the previous question, the mean velocity of the rocket reaching the...

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  19. In above question the retardation of rocket is:-

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  20. In the above question, the acceleration of the rocket is :

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