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Two tall buildings are 40m apart. A ball...

Two tall buildings are 40m apart. A ball thrown horizontally from a window 145m above the ground in one building is to enter a window 22.5m above the ground in the other building.The speed of the ball should be (A) 6m/s (B) 8m/s (C) 10m/s (D) 12m/s

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Knowledge Check

  • Two tall buildings are 40 m apart. With what speed must a ball be thrown horizontally from a window 145 m above the ground in one building, so that it will enter a window 22.5 m above from the ground in the other?

    A
    `5ms^(-1)`
    B
    `8ms^(-1)`
    C
    `10ms^(-1)`
    D
    `16ms^(-1)`

  • Two tall buildings are 30 m apart. The speed with which a ball must be thrown horizontally from a window 150 m above the ground in one building so that it enters a window 27.5 m from the ground in the other building is.

    A
    `2 m s^-1`
    B
    `6 m s^-1`
    C
    `4 m s^-1`
    D
    `8 m s^-1`

  • Two tall buildings are 100 m apart with what speed must a ball be thrown horizontally from the window 500 m above the ground in one building. So that it will enter a window 100 m above the ground in the other ?

    A
    `11 m//s`
    B
    `11.2 m//s`
    C
    `34 m//s`
    D
    `15 m//s`

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