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Forces and Motion
Average speed = total distance ÷ total time

Acceleration = change in velocity ÷ time taken

Acceleration = force ÷ mass

Force = mass x acceleration

Weight = mass x gravity (g)

Moment = force x perpendicular distance from pivot

Velocity = displacement ÷ time

Scalars and…

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Forces and Motion
Hookes Law
- Extension of a spring/metal wire is proportional to force stretching it (until elastic limit
reached, when it becomes permanently stretched)- as shown by linear region of force-
extension graph
- When a spring returns to original length, exhibits elastic behaviour, when it doesnt, plastic…


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