(Solved):   Spring WU?/ Consider the spring-mass system on a frictionless horizontal surface as shown. ...

 

Spring WU?/ Consider the spring-mass system on a frictionless horizontal surface as shown. Initially, the block is at position 1 where the spring is in a compressed state. The block moves to the left until it reaches the the position where the spring is in a more compressed state. Which of the following is TRUE about the work done by spring Wel and change in elastic potential energy AUel of the system? Direction of motion k wwwm X2 X1 O Wel <0; AUel < 0 O Wel > 0; AUel < 0 ? Wel > 0; AUel > 0 O Wel<0; AUel >0 x = 0