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Question

Particle of mass 0.3 kg is subjected to a force F = –kx with k = 15 N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin:


A

3 m/s2

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B

5 m/s2

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C

15 m/s2

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D

10 m/s2

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Solution

The correct option is D

10 m/s2


mass = 0.3 kg, x = 20 cm
K = 15 N/m
F = -kx = ma
15×20100=0.3aa=10m/s2
-ve sign indicates acceleration is towards mean position


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