A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of

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

Problem

25. A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of

400 \mathrm{~N} / \mathrm{m}

. The mass is set in simple harmonic motion with an amplitude of 10 cm . The speed of the 1.0 kg mass at the equilibrium position is (A)

2 \mathrm{~m} / \mathrm{s}

(B)

4 \mathrm{~m} / \mathrm{s}

(C)

20 \mathrm{~m} / \mathrm{s}

(D)

40 \mathrm{~m} / \mathrm{s}

(E)

200 \mathrm{~m} / \mathrm{s}