Turning forces and centre of mass
- Created by: Jasmin
- Created on: 18-04-13 18:42
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- Turning Forces and Centre of Mass
- Moment = turning effect of a force
- Moment (Nm) = Force (N) x Perpendicular distance from the line of action of the force to the pivot (m)
- Larger force larger moment
- Distance from pivot greater, greater moment
- To get maximum moment need to push at right angle to object
- CENTRE OF MASS = point at which its mass may be thought to be concentrated
- Centre of mass directly below point of suspension - when stops - equilibrium
- Freely suspended object will swwing until its centre of mass is vertically below point of suspension
- Rest in this position becaue no moment - pivot is in line with the line of action of the force
- To find centre of mass
- Suspend shape and plumb line from same point, wait until stops moving
- Draw line along plumb line
- Do same but suspend shape from different pivot
- Centre of mass is where the lines meet
- Do same but suspend shape from different pivot
- Draw line along plumb line
- Of symmetrical object
- Along lines of symmetry where meet
- Suspend shape and plumb line from same point, wait until stops moving
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