For a body moving with simple harmonic motion, the number of cycles per second, is known as its A. Oscillation B. Amplitude C. Periodic time D. Frequency

The correct answer is D. Frequency.

Frequency is the number of cycles per unit time. In the case of simple harmonic motion, the frequency is the number of times the body goes through its full cycle of motion in one second. The unit of frequency is the hertz (Hz), which is equal to one cycle per second.

Amplitude is the maximum displacement of the body from its equilibrium position. The period is the time it takes for the body to complete one full cycle of motion.

Oscillation is the repeated movement of a body back and forth or up and down about a central position.