Two blocks A and B each of mass m are connected by a spring of natural length L and constant k. A third mass m moving with speed v collides elastically with A. Which statement is correct?

Question

G1 Physics · Accepted Answer

Horizontal momentum of the block system is conserved. At maximum compression both connected blocks have the same instantaneous velocity; compare kinetic energies and spring energy. This gives B: Kinetic energy of A-B system at maximum compression is mv²/4..