A horizontal spring–mass oscillator has total mechanical energy

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

Problem

0.80\,\text{J}

. At an instant when its kinetic energy is

0.20\,\text{J}

, the spring constant is

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

. Calculate the magnitude of displacement of the mass from equilibrium. (a)

6.3\,\text{cm}

(b)

3.9\,\text{cm}

(c)

5.5\,\text{cm}

(d)

3.2\,\text{cm}