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March 27, 2017

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A coin is released inside a lift at a ht of 2m from the floor of the lift. The ht of the lift is 10 m . the lift is moving with an acceleration of 9m/s² downwards. The time after which the coin will strike with lift is: (g= 10 m/s)

  • physics - ,

    Both have the same initial velocity. The coin has the greater acceleration. The coin has to travel 2 m further than the bottom of the lift.

    distancelift=vi+9t^2/2
    distancecoin=vi+10t^2/2
    or
    vi+9t^2/2-2=vi+10t^2/2
    .5t^2=2

    t=2 seconds check my math.

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