A-LevelPhysicsWork, energy and power9702/12 · May/June 2014 · Q151 Mark

A small mass is placed at point P on the inside surface of a smooth hemisphere. It is then released from rest. When it reaches the lowest point T, its speed is 4.0 m s⁻¹. The diagram (not to scale) shows the speed of the mass at other points Q, R and S as it slides down. Air resistance is negligible. [Figure 15.1] The mass loses potential energy E in falling from P to T. At which point has the mass lost potential energy E/4?

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Dnone of these

✓ Correct answer

B: R

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2014 Paper 1 Variant 2, question 15.

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