1) 2023 S3 EOY P1 Q28

A car has a mass of 1500 kg. The car has four tyres, and each tyre has a contact area of
100 cm² with the road surface. What is the pressure exerted by the car on the road?

2) 2023 S4 EOY P1 Q09

The diagram shows a container made of tin and containing only air. It is connected to an air pump through a tube.

Air is pumped out of the container and it collapses when the pressure of the air inside falls to 2.0 × 10⁴ Pa. Atmospheric pressure is 1.0 × 10⁵ Pa and the surface area of face X of the container is 0.060 m².

What is the resultant force on face X when the container just collapses?

3) The diagram shows a simple mercury barometer.

When the mercury barometer is brought to the top of a mountain, the height h of the mercury column decreases.

Which statement explains this?

4) A manometer has a difference of 30 cm in the mercury levels before mercury is allowed to flow out of the manometer from the bottom valve. Given that the valve is closed again when the mercury level in the right hand tube has decreased by 10 cm, what will have happened to the mercury level in the left hand column?

5) A simple mercury barometer is carried to the top of a mountain,
where the atmospheric pressure is less than at its base.

How does the length X of the space above the mercury and
the pressure in this space change as the barometer is taken
from the base to the top of the mountain?