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Find the mass of the body which has 5J o...

Find the mass of the body which has 5J of kinetic energy while moving at a speed of `2m//s.`

A

`2kg`

B

`2.5kg`

C

`3kg`

D

`3.5kg`

Text Solution

Verified by Experts

The correct Answer is:
B
Here, kinetic energy of the body, `E_k =5J`
speed of the body, `upsilon = 2m//s`
if m is the mass of the body, then
`E_k = (1)/(2)m upsilon^2 or m = (2E_k)/(upsilon^2) = (2xx5J)/((2m//s)^2) =2.5kg`
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