Forces And Motion Flashcards
1
Q
What is a vector
A
A vector is any physical quantity that has direction and magnitude
2
Q
What is a scalar
A
A scalar is any physical quantity that is not directional
3
Q
What must vectors be
A
Tip to tail
4
Q
Equilibrium
A
When there is no resultant force on a body
5
Q
The moment of a force =
A
Force x distance from pivot
6
Q
Distance from pivot in moments must be
A
Perpendicular to the force
7
Q
The F in torque = Force x distance must be
A
In newtons and must be at 90 degrees to the lever
8
Q
Equilibrium in moments
A
Sum of clockwise = sum of anticlockwise
9
Q
Centre of mass?
A
The centre of mass of a body is the point through which a single force on the body has no turning effect
