Asked by tt
As a pendulum moves closer to the equilibrium position, how do the velocity, acceleration, and force change?
a.The velocity decreases, the acceleration decreases, and the net force decreases.
b.The velocity increases, the acceleration decreases, and the net force decreases.
c.The velocity increases, the acceleration increases, and the net force decreases.
d.The velocity decreases, the acceleration increases, and the net force increases.
All Answers 1
Answered by
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Answer: b.
Reason: As the bob moves toward equilibrium its potential energy converts to kinetic so the speed increases (maximum at equilibrium). The tangential acceleration a = -g sinθ (→ 0 as θ → 0), so the acceleration magnitude decreases. The restoring force F = -mg sinθ likewise decreases in magnitude as the angle approaches zero.
Reason: As the bob moves toward equilibrium its potential energy converts to kinetic so the speed increases (maximum at equilibrium). The tangential acceleration a = -g sinθ (→ 0 as θ → 0), so the acceleration magnitude decreases. The restoring force F = -mg sinθ likewise decreases in magnitude as the angle approaches zero.
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