P3 - Turning Forces And Centre Of Mass Flashcards
1
Q
What happens to the moment exerted when using a longer spanner and why?
A
The same force can exert a larger moment because the distance is greater.
2
Q
How can you get the maximum moment?
A
By pushing at right angles to the spanner.
3
Q
What is an object’s centre of mass?
A
The point at which the whole mass is concentrated.
4
Q
What a freely suspended weight do when let go?
A
Swing until it’s centre of mass is vertically below the point of suspension.
5
Q
How can you find the centre of mass for a flat shape? [4]
A
1) suspend the shape and a plumb line from same point until they stop moving.
2) draw a line along plumb line.
3) do again from different pivot point.
4) centre is where they cross.
6
Q
What is a moment?
A
The turning effect of a force.
