A block of mass m=0.1kg is connected to a spring of unknown spring constant k. It is compressed to a distance x from its equilibrium position and released from rest. After approaching half the distance (2x) from the equilibrium position, it hits another block and comes to rest momentarily, while the other block moves with velocity 3ms−1. The total initial energy of the spring is:
Held on 10 Apr 2015 · Verified 6 Jul 2026.
0.6J
0.8J
1.5J
0.3J
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