A-LevelPhysicsWork, energy and power9702/12 · Feb/Mar 2018 · Q161 Mark

A bead is released from rest at point P and slides along a wire, as shown. [Figure 16.1] The track loops around and forms a vertical circle of diameter 40 cm. At point Q, the bead has a speed of 1.4 ms⁻¹. Air resistance and friction on the wire are negligible. What is the height h from which the bead is released?

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A0.30 m

B0.40 m

C0.50 m

D0.60 m

✓ Correct answer

C: 0.50 m

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2018 Paper 1 Variant 2, question 16.

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