SAT Subject Physics Practice Question 234: Answer and Explanation

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Question: 234


A block of mass m undergoing simple harmonic motion. Frictional forces are negligible and can be ignored.

The graph of which quantity (versus time) would look like a sine wave?

A. Amplitude
B. Frequency
C. Period
D. Position of block
E. Total mechanical energy of the block

Correct Answer: D


If A is the amplitude of the oscillations, then the position of the block varies sinusoidally between y = –A and y = +A. The equation for the position (as a function of time, t) will have the form y = Asin(ωt + φ), where ω = 2πf.

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