Moments (Edexcel A Level Physics)

Exam Questions

6 mins2 questions
1a
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1 mark

A uniform paving slab is to be used as a garden step.

State what is meant by the centre of gravity of an extended body.

1b
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4 marks

The paving slab has a weight of 310 N and a length of 90 cm and will be supported at two points, P and Q, as shown. The distance between P and Q will be 75 cm.

q11b-nov-2020-9ph0-01-edexcel-as-a-level-phy

This might be unsafe because a person who places all their weight at the end of the slab might tip the slab.

A person of mass 70 kg stands at the end of the slab.

Deduce whether the slab will tip.

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