[" A spring when compressed by "4cm],[" has "2J" energy stored in it.The force "],[" required to extend it by "8cm" will be "]

A spring when compressed by 4 cm has 2 J energy stored in it. The force requried to extend it by 8 cm will be

When a spring is compresssed by 3 cm the potential energy stored in it is U. When it is compressed further by 3cm, the increase in potential energy is

If a spring extends by x and on loading, energy stored by the spring is

When a spring is stretched by 10 cm, the potential energy stored is E. When the spring is stretched by 10 cm more, the potential energy stored in the spring becomes

When a spring is stretched by 10 cm, the potential energy stored is E. When the spring is stretched by 10 cm more, the potential energy stored in the spring becomes