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A body of mass 1 kg is thrown upwards wi...

A body of mass 1 kg is thrown upwards with a velocity 20 `ms^(-1)`. It momentarily comes to rest after attaining ah height of 18m. How much energy is lost due to air friction? (Take g=`ms^(-2)`)

A

10J

B

20J

C

30J

D

40J

Text Solution

Verified by Experts

The correct Answer is:
B
Loss of energy `=(1)/(2)mv^(2)-mgh=20J`
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