Explaining motion
Forces - Cambridge OCR 21st Century
Forces arise from the interactions of two objects. They can be divided into two categories - contact forces and non-contact forces.

How can we describe motion? - Cambridge OCR 21st Century
The movement of objects can be described using motion graphs and numerical values. These are both used to help in the design of faster and more efficient vehicles.

Quiz: Scalar and vector quantities
This interactive quiz is suitable for GCSE physics students studying scalar quantities, vector quantities and calculations involving forces.

Quiz: Moments, levers and gears
This interactive quiz is suitable for GCSE physics students studying moments, moments and balanced objects, levers and gears.

Force and motion - Cambridge OCR 21st Century
Unbalanced forces on an object will change its motion. Ideas about force and momentum can be used to explain road safety measures.

Quiz: Forces, acceleration and Newton's Laws
This interactive quiz is suitable for GCSE physics students studying terminal velocity, Newton's first, second and third laws and braking.

Quiz: Momentum - Higher
This interactive quiz is suitable for GCSE physics students studying momentum calculations, conservation of momentum and force and momentum.

Motion and energy transfer
Energy stored in a moving object is called kinetic energy. As an object is raised above ground its gravitational potential energy increases. When a force moves an object work is done.

Quiz: Change in energy stores
This interactive quiz is aimed at GCSE physics students studying types of energy store, energy transfers, energy dissipation, the conservation of energy and energy calculations.

Sample exam questions - motion - Cambridge OCR 21st Century
Understanding how to approach exam questions helps boost exam performance. Questions will include multiple choice, descriptions and explanations, using mathematical skills and extended writing.

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