P9
- Created by: ak27330
- Created on: 19-01-20 09:57
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- P9
- Force Basics
- vector- magnitude and direction
- scalar- magnitude only
- contact or non-contact
- friction is a contact force
- Gravity is non-contact
- When 2 objects interact, force produced on both. Equal and opposite
- Finding the resultant force
- free body force diagrams- show all forces acting on an isolated object or system
- Can help see if there's a resultant force
- Lengths of arrows represent magnitude
- Forces along same line, find difference in sides
- Resultant force=0, in equilibrium
- converting free body force diagram to tip-to-tail
- free body force diagrams- show all forces acting on an isolated object or system
- Moments
- Moments- turning effect of a force
- M= Fd
- M-Moments(Nm) F- Force (N) d- Distance(m)
- Equilibrium- the sum of clockwise moments= the sum of anti-clockwise moments
- Pivot assumed at centre of mass
- Levers increase the distance from the pivot at which the force is applied
- Gears- larger, turns slower
- Force Basics
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