Forces

What is a force

A force can change;

• size

• shape

• motion

• density

Organize these types of forces into the right categories

Groups:

(a) Contact Forces

,

(b) Non-contact forces

• air resistance

• gravitational force

• elastic force

• applied force

• friction

• tension

• normal

• magnetic force

• electrostatic force

Match the following types of forces with their desription.

• A force that opposes motion.

• Applied force

• A push or pull applied by a body.

• Electrostatic force

• A force between 2 charged objects.

• Magnetic force

• An force between the poles of a magnet.

• Friction

• A force that a surface pushes back with.

• Normal force

The SI unit for force is

What is the approximate value of acceleration due to gravity?

Mathematical Equivalence

ON

What is the centre of gravity of a body?

Match the image with the type of equilibrium.

• Stable equilibrium

• 
• Neutral Equilibrium

• 
• Unstable equilibrium

• 

An object will topple over if it's centre of gravity passes outside its base.

The factors that affect this are the ​ (a)   of the centre of gravity and the ​ (b)   of the base.

• height
• width
• length, depth
• mass, area
• shape, position

The centre of gravity of a uniform body acts at its