equal and opposite
What equal and opposite means in Physics GCSE, as defined for AQA.
Definitions of equal and opposite
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain equal and opposite in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The size of the positive charge is exactly equal to the negative charge picked up by the other material.
The forces in an interaction pair are equal in magnitude and opposite in direction.
Topics that use equal and opposite
- Contact and non-contact forces (AQA GCSE)
- Static charge (AQA GCSE)
Related terms
- electrostatic force
- acting on different objects
- attraction and repulsion
- charge redistribution
- charging by friction
- conservation of charge
- contact forces
- effect of separation
Using equal and opposite in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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