Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

The answer is:

C. Velocity and Displacement.

By the time a mass reaches its maximum displacement, velocity has become zero.

Explanation:

simple periodic motion could be a special variety of movement or oscillation motion wherever the restoring force is directly proportional to the displacement and acts within the direction opposite thereto of displacement.

Simple harmonic motion will function a mathematical model for a spread of motions, like the oscillation of a spring. additionally, alternative phenomena will be approximated by easy periodic motion, together with the motion of a straightforward apparatus still as molecular vibration.

The answer is C. Velocity and Displacement.

By the time a mass reaches its maximum displacement, velocity has become zero.