A block on a frictionless horizontal surface is attached to a spring with force constant

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

0.30\,\text{kg}

block on a frictionless horizontal surface is attached to a spring with force constant

40\,\text{N/m}

. The block is pulled to

x = +0.10\,\text{m}

from equilibrium and released from rest. Taking the

+x

direction to the right, what is the block’s initial acceleration? (a)

+13\,\text{m/s}^2

(b)

-4.0\,\text{m/s}^2

(c)

-13\,\text{m/s}^2

(d)

+4.0\,\text{m/s}^2