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Question 6

From Physics HL Paper 1A (May 2025, TZ3)

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  1. A ball of mass 0.4 kg is attached to a string of length 0.8 m. The ball is rotated in a vertical circle such that the speed at the lowest position is 6.0 ms−16.0 \, \text{ms}^{-1}.
Diagram showing a ball attached to a string of length 0.8m, rotating in a vertical circle.
Diagram showing a ball attached to a string of length 0.8m, rotating in a vertical circle.

What is the tension in the string when the ball is at the lowest position?

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