A block is attached to one end of a horizontal spring of force constant

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

Problem

2\,\text{kg}

block is attached to one end of a horizontal spring of force constant

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

. The spring is stretched by

0.20\,\text{m}

and the block is released from rest on a smooth surface. What is the speed of the block when the extension reduces to

0.05\,\text{m}

? (a)

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

(b)

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

(c)

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

(d)

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