Question

A Particle Of Mass 0.3kg Is Subjected To A Force F= -kx With k=15N/m. What Will Be It's Initial Acceleration If It Is Released From A Point x=20cm?

Answer 1

Putting values in F=-kx
=>F=-300N
F=ma =>a=F/m
=>a=-300/0.3=-1000m/s

Here, the negative sign means the direction opposite to the direction in which the particle was pulled.