A vertical spring with force constant is fixed at its top end

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A vertical spring with force constant

65\,\text{N/m}

is fixed at its top end. When a certain mass is attached, the spring stretches

8.0\,\text{cm}

and comes to rest. What is the mass? (Use

g = 9.8\,\text{m/s}^2

.) (a)

0.66\,\text{kg}

(b)

0.27\,\text{kg}

(c)

0.53\,\text{kg}

(d)

1.06\,\text{kg}