Starting from the origin a body oscillates simple harmonically with a period of $$2$$ $$s.$$ After what time will its kinetic energy be $$75\% $$ of the total energy?
- A$${1 \over 6}s$$
- B$${1 \over 4}s$$
- C$${1 \over 3}s$$
- D$${1 \over 12}s$$
✓ Correct answer: A
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