CAIE A-Level Physics 5.1.2 Principle of Conservation of Energy

Practise tracking energy transfers in falls, slopes, springs and mechanical systems, setting up balances and judging whether pathways fit the forces and motion.

Exam points

state and apply conservation of energy by tracking transfers between useful, thermal, gravitational, kinetic and other forms
set up an energy balance to calculate an unknown energy, speed, height, work or loss in a physical system
judge whether a proposed energy pathway is consistent with the stated forces and motion, including the effect of resistance

[Maximum number: 1]

Another parcel is accidentally released from rest by a different aircraft when it is hovering at a great height above the ground. Air resistance is now significant.

Describe the energy conversion that occurs when the parcel is falling through the air at constant (terminal) speed.

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5.1.2—The principle of conservation of energy question 1