A particle of mass 0.3 kg is subjected to a force F = −kx with k = 15 Nm . What will be its initial acceleration, if it is released from a point 20 cm away from the origin ?
3 ms-2
15 ms-2
5 ms-2
10 ms-2
Given :
m = 0.3 kg
x = 20 cm
and k = 15
N/m F = - kx ...(i)
and F = ma ...(ii)
∴ ma = - kx
⇒ a = −15/0.3 × 20 × 10-2
⇒ a = −15/3 × 2 = −10 ms-2
∴ Initial acceleration,
a = 10 ms-2
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