An air suspension chamber in a mountain bike fork is sealed so that no air can escape. The chamber acts as a pneumatic spring to absorb shocks.
Initially, the volume of the trapped air in the suspension chamber is 120 cm3120\text{ cm}^3120 cm3 and its pressure is 2.40×105 Pa2.40 \times 10^5\text{ Pa}2.40×105 Pa. During a hard landing, the piston is forced in and the volume of the chamber decreases to 30 cm330\text{ cm}^330 cm3. Calculate the pressure of the air at this compressed volume.
State an assumption you have made about the air in the chamber during this compression.
When the suspension is compressed rapidly, both the air chamber and the gas inside become warm. Suggest two reasons why this happens.
A construction worker uses a pulley system to lift a crate of tiles to a higher floor.
State the relationship between work done, force, and distance moved.
Calculate the work done in lifting a mass of 15.0 kg15.0\text{ kg}15.0 kg of tiles through a vertical height of 8.40 m8.40\text{ m}8.40 m. [Take g=10 N/kgg = 10\text{ N/kg}g=10 N/kg]
