A spring is stretched by 3 cm, its potential energy is U_1. If the spring is stretched by 6 cm, its potential energy be that is stored in it is U_(2)="……"U_(1). (Fill in the blank).

A spring is stretched by 3 cm, its potential energy is U_1. If the spr

1.	A spring is stretched by 3 cm, its potential energy is U_1. If the spring is stretched by 6 cm, its potential energy be that is stored in it is U_(2)="……"U_(1). (Fill in the blank).
Answer» Solution :`U_(1) = (1)/(2)ky_(1)^(2)= (1)/(2)k(3)^(2)= (1)/(2)KXX 9` `U_(2)= (1)/(2)ky_(2)^(2)= (1)/(2)k(6)^(2)= (1)/(2)kxx 36` `therefore (U_2)/(U_1)= (36)/(9)= 4` `therefore U_(2) = 4U_(1)`.