4 (a) Figure 5 shows a girl standing on a diving board.

Calculate the total clockwise moment of the weight of the diving board and the weight of the girl about Point A. Give the unit.

Use the correct equation from the Physics Equations Sheet.

Total clockwise moment about point A = …………………………………

(4 marks)

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4 (b) Figure 6 shows the girl standing at a different place on the diving board.

The support provides an upward force F to keep the diving board balanced.

Figure 7 shows how the upward force F varies with the distance of the girl from Point A.

Explain, in terms of clockwise and anticlockwise moments, why the upward force F increases as shown in Figure 7.

(3 marks)

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From Q4 P3 AQA June 2014 (Higher)