Question

A particle of mass 0.3 kg subject 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) 15 m/s²(b) 3 m/s²(c) 10 m/s²(d) 5 m/s²

Answer 1

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Answer 2

Answer:

Force   F=−kx= −15 x (x)

At  x=20 cm=0.2 m,     F= −(-15×0.2)= +3

Acceleration   a=  F/m

F = m* a or,   -kx = ma

a = 3 / 0.3

           a  = 10 m/ s^2