Photo AI
Complete the sentence - AQA - GCSE Physics - Question 9 - 2023 - Paper 1
Question 9
Complete the sentence. Air particles in the tyre move quickly in _____________________ directions. When the tyre is at the correct pressure, pumping more air into ... show full transcript
Worked Solution & Example Answer:Complete the sentence - AQA - GCSE Physics - Question 9 - 2023 - Paper 1
Step 1
Step 2
Explain why the pressure increases as more air is pumped into the tyre.
Answer
When more air is added to the tyre, there are more air particles within the same volume. This leads to a greater number of collisions between the air particles and the walls of the tyre. Consequently, the frequency of these collisions increases, which results in a higher pressure since pressure is defined as the force exerted per unit area.
Step 3
Explain why the air pressure in a car tyre changes if the temperature of the air in the tyre increases.
Answer
As temperature increases, the air particles gain kinetic energy and move faster on average. This increase in speed leads to more frequent collisions between the air particles and the tyre walls, causing them to collide with greater force. Hence, the overall pressure inside the tyre increases as the temperature rises due to the greater force exerted per unit area.