mrsclnantambu6742 mrsclnantambu6742 10-01-2024 Physics contestada Each spring has an unstretched length of 2 m and a stiffness of k = 290 N/m. What is the potential energy stored in the spring when it is compressed by 0.5 m? a. 36.25 J b. 72.5 J c. 145 J d. 290 J