Mr. Thompson hangs a small weight from a spring, which expands and contracts a few times before resting at equilibrium. Which forces are primarily in action?
A The normal force of the weight pulls down on the spring, while the frictional force of the spring pulls up on the weight.
B. The force of gravity on the weight is pulling down on the spring, while the elastic force of the spring pulls up on the weight.
C. The elastic force of the weight pulls down on the spring, while the normal force of the spring pulls up on the weight.
D. The frictional force of the weight pulls down on the spring, while the gravitational force of the spring pulls up on the weight.
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