Figure 9 shows a sheet of card.

(a) Describe how to find the centre of mass of this sheet of card.

You may draw diagrams as part of your answer.

(5 marks)

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6 (b) Figure 10 shows a person in his wheelchair.

6 (b) (i) Tipping the wheelchair at a large angle may cause it to become unstable and to topple over.

Explain why.

(2 marks)

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6 (b) (ii) Some disabled athletes use a wheelchair in sports.

State two ways of changing the design of the wheelchair in Figure 10 so that it is more stable when used by a disabled athlete.

(2 marks)

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From Q6 P3 AQA June 2014 (Higher)