IB Physics HL A.3.9 Kinetic Energy Question Bank
Practise HL kinetic-energy calculations for particles, photoelectrons, collisions, orbits and model assumptions in exam questions.
- Syllabus
- First assessment 2025
- Course
- Physics HL
- Level
- HL
Exam points
- Apply kinetic-energy equations to particles, photoelectrons and electrical acceleration with correct units.
- Use kinetic-energy ratios with momentum and mass data, then evaluate energy loss in collisions and bounces.
- Identify assumptions in kinetic-energy models for wind power, radiation or non-relativistic particles.
A.3.9—Kinetic energy question 1
A toy rocket is made from a plastic bottle that contains some water.
Air is pumped into the vertical bottle until the pressure inside forces water and air out of the bottle. The bottle then travels vertically upwards.
The air-water mixture is called the propellant.
The variation with time of the vertical velocity of the bottle is shown.
The bottle reaches its highest point at time on the graph and returns to the ground at time . The bottle then bounces. The motion of the bottle after the bounce is shown as a dashed line.
The bottle bounces when it returns to the ground.
Calculate the fraction of the kinetic energy of the bottle that remains after the bounce.
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