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A 100 gm light bulb dropped from a tower...

A `100 gm` light bulb dropped from a tower reaches a velocity of `20 m//s` after falling through `100 m`. The energy transferred to the air due to viscous force is

A

`98J`

B

`20J`

C

`118 J`

D

`78 J`

Text Solution

Verified by Experts

The correct Answer is:
D
`W = P.E_(i)-K.E_(f)`
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