The amplitude of the motion of a body performing simple harmonic motion decreases with time because
A
friction force dissipate the energy of motion
B
the frequency of oscillation varies with time
C
the period of oscillation varies with time
D
energy is supplied by some external agency
Verified Correct Answer: A.
Physical Principles & Numerical Solution
The amplitude of the motion of a body performing simple harmonic motion (SHM) decreases over time primarily due to energy loss, often caused by friction or other resistive forces. Therefore OPTION A is correct.
Source: Myschool Past Questions Archive (Record #33870)