Simple harmonic motion takes place when there is a restoring force F, proportional to the displacement from the equilibrium position.
The force acts in a direction opposite to the displacement, so that we have .
1. Which of the following is not an example of approximate simple harmonic motion?
a. a ball bouncing on the floor
b. a child swinging on a swing
c. a piano wire that has been struck
d. a car's radio antenna waving back and forth
2. A mass attached to a spring vibrates back and forth. At the equilibrium position, the
a. acceleration reaches a maximum.
b. net force reaches a maximum.
c. velocity reaches a maximum.
d. velocity reaches zero.
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