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An elevator car (lift) is moving upward ...

An elevator car (lift) is moving upward with uniform acceleration of `2 m//s^(2)`. At the instant, when its velocity is 2 m/s upwards a ball thrown upward from its floor. The ball strikes back the floor 2s after its projection. Find the velocity of projection of the ball relative to the lift.

A

`10 m//s uarr`

B

`10 m//s darr`

C

`12 m//s uarr`

D

`12 m//s darr`

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • The mass of a lift if 600kg and it is moving upwards with a uniform acceleration of 2m//s^(2) . Then the tension in the cable of the lift is :

    A
    7200 N
    B
    5900 N
    C
    4700 N
    D
    zero N

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    A
    `1/2s`
    B
    `1/3s`
    C
    `1/4s`
    D
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