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A spring when stretched by 2 mm its pote...

A spring when stretched by 2 mm its potential energy becomes 4 J. If it is stretched by 10 mm, its potential energy is equal to

A

32 J

B

36 J

C

30 J

D

40 J

Text Solution

Verified by Experts

The correct Answer is:
B
`u=1/2kx^2implies u prop x^2 implies (u_1)/(u_2)=(2/6)^2`
`therefore u_2=u_1xx(36)/(4)=4xx9=36` J
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