3.2- Using Physics To Make Things Work Flashcards
1
Q
What is the centre of mass?
A
The point where the mass of the object is concentrated
2
Q
What is a moment?
A
The turning effect of a force
3
Q
What will make an object topple?
A
When the line of action is outside the base of the object
4
Q
Why is a liquid almost incompressible?
A
Because pressure is exerted equally in all directions
5
Q
What is an object doing when it is travelling in a circle?
A
Accelerating towards the centre which changes the direction rather than speed
6
Q
What is the resultant force called that is directed to the centre of a circle?
A
Centripetal
7
Q
Centripetal force increases when… (3)
A
> the mass increases
the speed increases
the radius of the circle decreases
