Question

A pendulum bob is swinging in a vertical plane, such that its angular amplitude is less than 90°. At its highest point, the string is cut. Which trajectory is possible for bob afterwards?

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Answer 1

Explanation:

The bob's velocity will be zero at the highest position. If the string is severed at that point, the tension will also be zero. Only gravity's force will act on the bob at this point. As a result of this force, the bob will go vertically downwards.