# physics # 9

9. A block attached to a spring of negligible mass undergoes simple harmonic motion on a frictionless horizontal surface. The potential energy of the system is zero at the equilibrium position and has a maximum value of 50 J. When the displacement of the block is half the minimum value its instantaneous kinetic energy is
a.) 0 J
b.) 12.5 J
c.) 25 J
d.) 37.5 J
e.) 50 J

1. 0
2. 0
3. 13
1. 37.5

1. 0
2. 0
posted by Anonymous

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