A body of mass 10 kg dropped from a heig...

A body of mass 10 kg dropped from a height 20 m, acquires a velocity of 10m/s after a falling through a distance of 20m. What is the work done by the air resistance on the body?

A

1500 J

B

1800J

C

`-1500 J`

D

`-1800J`

Text Solution

Verified by Experts

The correct Answer is:

`(3)`

`E_(i) = Mgh`
`E_(f) = 1/2 mv^(2)`
`W = E_(i) - E_(j)`

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