Question

A particle of mass 0.3 kg subject to a force `F=-kx` with `k=15N//m`. What will be its initial acceleration if it is released from a point 20cm away from the origin?
A. `10 m//s^(2)`
B. `5 m//s^(2)`
C. `15 m//s^(2)`
D. `3 m//s^(2)`

Answer 1

Correct Answer - A
(a) As per question, restoring force on the particle is `F = 15 x 0.2 = 3 N`
So the acceleration is `3//0.3 = 10 m//s^(2)`.