Question

A spring is given a work of 25 joule and it extends about 2 cm. if the spring needs to be stretches 5 cm. it requires a work of .... J

Answer 1

Dik : W1 = 25 J
         L1 = 2 cm = 0,02 m
         L2 = 5 cm = 0,05 m
dit : W2 ?
jwb : W1.L2 = W2.L1
        25.0,05 = W2.0,02
        1,25 = 0,02W2
           W2= 62,5 J