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Question

A particle of mass 0.3 kg is subjected to a force F=kx with k=15 Nm. What will be the magnitude of its initial acceleration (in ms2), if it is released from a point x=20 cm from its equilibrium position?
  1. 10
  2. 5
  3. 20
  4. 15


Solution

The correct option is A 10
Assuming the direction of compression as negative,

F=kx=maa=15(0.2)0.3=10 m/s2

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