Two identical springs

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

Problem

Two identical springs, each of force constant

300\,\text{N\,m}^{-1}

, are attached in parallel to a

1.0\,\text{kg}

block on a smooth horizontal surface. The block is pulled

5.0\,\text{cm}

from equilibrium and released from rest. What is its maximum speed during the subsequent motion? (a)

1.73\,\text{m\,s}^{-1}

(b)

0.61\,\text{m\,s}^{-1}

(c)

1.22\,\text{m\,s}^{-1}

(d)

2.45\,\text{m\,s}^{-1}