Force

1. Amount of matter in a body
2. Scalar quantity
3. Kilogram (kg)

Attachments:

• Force: Momentum & Mass

1. Mass x velocity
2. kg m/s
3. Principle of conservation of momentum
   1. Total momentum before an interaction is equal to the total momentum after
      1. Provided no resultant force acts on the system
4. Vector quantity

Attachments:

• Force: Introduction to Force & Newton's Laws of Motion
• Force: Moments of a Force & Equilibrium

1. That which can cause acceleration
2. Vector quantity
3. Newton (N)
   1. 1 N = 1 kg m/s²
4. Moment
   1. Force x perpendicular distance to the fulcrum
5. Lever
   1. Rigid body that is free to rotate about a fixed axis
6. Couple
   1. A pair of equal and opposite forces whose lines of action do not coincide
7. Torque
   1. The magnitude of one of the forces in a couple multiplied by the distance between them

Attachments:

• Linear Motion: Newton's Equations of Motion

1. A body will remain at rest or continue moving at constant velocity unless acted on by an external force
2. The rate of change of momentum is proportional to the applied force and takes place in the direction of the force
   1. F = ma
3. For every action there is an equal and opposite reaction

Attachments:

• Force: Gravity

1. Newton's Law of Universal Gravitation
   1. Any two objects exert a gravitational force upon each other
2. Centre of gravity
   1. The point at which the whole weight of a body appears to act

1. A force that opposes the motion of a body

Attachments:

• Force: Weight & Friction

1. A force
2. Mass x gravity
3. Newtons