Newton's first law (AQA GCSE Physics): Flashcards
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Newton's first law
Newton's first law
Object stays still or moves in straight line at constant speed unless forces are unbalanced
Balanced forces
Balanced forces
Forces that cancel each other out completely
Effect of balanced forces on motion
Effect of balanced forces on motion
No change - stays still or moves at constant speed
Unbalanced forces
Unbalanced forces
Forces that don't cancel, creating a resultant force
Effect of unbalanced forces
Effect of unbalanced forces
Object accelerates (speeds up, slows down, or changes direction)
Resultant force
Resultant force
Net force when forces don't cancel out
Forces on stationary object
Forces on stationary object
All forces are balanced
Forces on object at constant speed
Forces on object at constant speed
All forces are balanced
How to calculate resultant force
How to calculate resultant force
Add same direction forces; subtract opposing forces
Zero resultant force means
Zero resultant force means
Stationary OR moving at constant speed
What causes acceleration
What causes acceleration
Unbalanced forces (resultant force)
Can moving objects have balanced forces?
Can moving objects have balanced forces?
Yes - if moving at constant speed in straight line