Question

A cyclist is riding a bicycle along a level road. The combined mass of the cyclist and bicycle is 70.0 kg. The total contact area between the tyres and the road is 8.0 ${\times}$ 10⁻⁴ m².

The average pressure exerted by the tyres on the road is:

1. 1.2 × 10⁻⁶ Pa
2. 5.6 × 10⁻² Pa
3. 8.8 × 10⁴ Pa
4. .3 × 10⁵ Pa
5. 8.6 × 10⁵ Pa.

1 mark