A block of mass `'m'` is attached to a spring in natural length of spring constant `'k'`. The other end `A` of the spring is moved with a constat velocity `v` away from the block . Find the maximum extension in the spring.

Options

A. `1/4sqrt((mv^(2))/k)`
B. `sqrt((mv^(2))/k)`
C. `1/2sqrt((mv^(2))/k)`
D. `2sqrt((mv^(2))/k)`

Answer

B