The total energy of a body executing a linear S.H.M. is 20 J. What is the maximum velocity of the body, if the mass of the body is 0.4 kg ?

Options

A. 5 m/s
B. 10 m/s
C. 15 m/s
D. 20 m/s

Answer

B

Explanation

In the S.H.M., Total energy=Maximum `K.E.=(1)/(2)mv_(m)^(2)`
`therefore (1)/(2)mv_(m)^(2)=20 J`
`therefore v_(m)^(2)=(20xx2)/(m)=(40)/(0.4)=100`
`therefore v_(m)=10 m//s`