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consider a drop of rain water having mas...

consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 5 `m//s`.Take g constat with a vlaue of 10 `m//s^(2)`. The work donw by the (i) gravitational froce and the (ii) resistive force of air is

A

`(i)-10J" "(ii) -8.25J`

B

`(i)1.25J" "(ii)-8.25J`

C

`(i)100J" "(ii)8.75J`

D

`(i)10J" "(ii)-8.75J`

Text Solution

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The correct Answer is:
D
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Consider a drop of rain water having mass 1 g falling from a height of 1 km . It hits the ground with a speed of 50 m//s Take g constant with a volume 10 m//s^(2) . The work done by the (i) gravitational force and the (ii) resistive force of air is :

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Knowledge Check

  • A raindrop of mass 1g falling from a height of 1km hits is the ground with a speed of 50 ms^(-1) . Which of the following statements is correct? ("Taking" g= 10ms^(-2)) .

    A
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    B
    The gain in kinetic energy of the drop is 1.25 J
    C
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    D
    All of these

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