Unit 5 - Forces

 

5.1  Forces and their interactions

 

5.1.1.  Scalar and vector quantities

 

5.1.2.  Contact and non contact forces

 

5.1.3  Gravity

 

5.1.4  Resultant Forces

 

 

5.2  Work done and energy transfer

 

 

5.3  Forces and elasticity

 

 

5.4. Moments, levers and gears (Physics only)

 

 

5.5  Pressure and pressure differences in fluids

(Physics only)

5.5.1.  Pressure in a fluid

 

5.5.2   Atmospheric pressure

 

5.6  Forces and motion

 

5.6.1  Describing motion along a line

 

1 - distance and displacement

 

2 - speed

 

3 - velocity

 

4 - the distance-time relationship

 

5 - acceleration

terminal velocity

 

 

5.6.2  Forces, acceleration and Newton's Law of motion

 

1 - Newton's First Law

 

2 - Newton's Second Law

 

3 - Newton's Third Law

 

 

5.6.3  Forces and braking

 

1 - stopping distance

 

2 - reaction time

 

3 - factors affecting braking distance

 

 

5.7.  Momentum

 

5.7.1  Momentum is a property of moving objects

 

5.7.2  Conservation of momentum

 

5.7.3  Changes in momentum (physics only)