Answer:
D. "The net force is zero, so the acceleration is zero"
Explanation:
edge 2020
The system at point D is defined by "The net force is zero, so the acceleration is zero"
When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.
Given the image which shows one complete cycle of a mass on a spring in simple harmonic motion. An illustration of a mass on a vertical spring with a transverse wave showing the position of the mass on the spring will make a transverse wave shape if bouncing up and down and moving horizontally.
The shortest spring has the mass at the top of each crest and are labeled A and E respectively. The position where the mass in in the trough of the transverse wave would be labeled C and stretches the spring the farthest. The middle length springs has masses where the equilibrium of the material of the medium containing the transverse wave would be at the equilibrium of the material would be and are labeled B and D.
At D, the net force becomes zero. This makes the system to be in equilibrium or moving with constant velocity. The acceleration becomes zero.
Thus, the system at point D is defined as "The net force is zero, so the acceleration is zero"
Learn more about net force.
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