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GCSE Physics
Resultant force: GCSE calculations and examples
Combine forces on one object, keep track of direction and explain what the result tells you about motion.
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Frequently asked questions
Straight answers to the questions people ask most often.
Can I find speed from the resultant force alone?
No. With the mass, the resultant gives acceleration through a = F ÷ m. Acceleration is a change in velocity per second, not the velocity itself.
What does a minus sign in a force answer mean?
It means the force points opposite to the direction you chose as positive. If right is positive, −7 N means 7 N left. Always state your direction convention.
Sources and references
Sources and references
Official guidance
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Other sources
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