GCSE Questions: Pressure, buoyancy, upthrust and fluids

Q8.

(a) A car has a total weight of 12000N.

It has four tyres each having an area of 25cm² in contact with the road.

Calculate the pressure of the car on the road.

[4 marks]

(b) Seatbelts in cars are made of a wide material that stretches in a crash.

(i) Explain why it is important that the material is wide.

[1 mark]

(ii) Explain why it is important that the material is stretchy.

[2 marks]

The seatbelts for children are narrower than adult seatbelts.

Why is it safe for children's seatbelts to be narrower than adult seatbelts?

[2 marks]

(Total 9 marks)