In the gym, use an elastic band to strengthen your muscles. Suppose the gang

elastic behaves like an ideal spring with elastic constant K = 1 N / m. How much work

is it accomplished by extending the band by 50 cm?

A) 0.125 J

B) 0.25 J

C) 0.5 J

D) 1 J

E) 2 J

Hi!

answer is A), how do you solve this one?

Thanks!!