A spring of force constant 800 N/mhas an extension of 5 cm . The work done in extending it from 5 cm to 15 cm is

A spring of force constant 800 N/mhas an extension of 5 cm . The work

1.	A spring of force constant 800 N/mhas an extension of 5 cm . The work done in extending it from 5 cm to 15 cm is
Answer» 16 J 8 J 32J 24J Answer :B