Physics 3.2
- Created by: frankie306
- Created on: 20-03-15 12:23
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- Physics 3.2
- moments
- moment = force x distance
- units= Nm
- the turning effect when a force acts on something which has a pivot point
- increase by
- increase in lever length
- equal moments = balanced object
- centre of mass
- point at which it's mass is concentrated
- how to find
- lines of symmetry
- when hung from a point the object will be in equilibrium
- using plumbline
- equilibrium
- centre of mass directly underneath point of suspention
- stability
- increased when
- larger base
- lower centre of mass
- topple when
- centre of mass outside base
- increased when
- hydraulics
- pressure
- force acting per unit area
- = force/area
- pascals
- fluid
- particles are free to flow past each other
- causes pressure to be exerted on surroundings
- pressure in a fluid
- acts equally in all directions
- liquids cannot be compressed
- pressure
- circular motion
- velocity in a cirlce
- constantly changing
- centripetal acceleration
- acceleration towards the centre of the cirlce
- centripetal force
- causes change in direction of motion
- depends on mass, speed and radiusof circle
- force that acts towards the centre of the cirlce
- velocity in a cirlce
- pendulums
- T=1/f
- frequency of oscillations
- number of complete cycles of oscillations per sec
- Hz
- greater frequency
- shorter oscillation time
- longer length
- longer time period
- moments
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