For a mass–spring system in simple harmonic motion
PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
For a mass–spring system in simple harmonic motion, the displacement is positive but decreasing at a certain instant. Which of the following correctly gives the signs of velocity v and acceleration a at that instant?
(a) v negative, a negative
(b) v positive, a negative
(c) v positive, a positive
(d) v negative, a positive