Physics (Term 1)

What is a force

A force is that quantity that changes a body’s size, shape, motion, direction and state of rest.

What are forces measured in?

Newtons

What are all the two types of forces?

Contact and Non-contact

What is a contact force

A force that physically touches.

What is a Non - Contact Force

A force that acts in a field.

What are all the types of contact forces

Normal force, Applied force, Tension force, Frictional force, Weight force and Lift force

What is a Normal force? (Fn)

A support force exerted on a object by another stable force

What is an Applied Force? (Fa)

Force placed on another object through push and pull motion by another body/object

What is a Tension force? (Ft)

Forced applied through a rope, cord, spring ect by forces from opposite directions.

What is a Frictional Force (Ff)

Force that opposes motion

What is a Weight force? (Fw)

Force that a body/object has due to gravity

What is a Lift force? (Fl)

An aerodynamic force perpendicular to the objects direction

What are the Cause of friction?

Friction is caused when two surfaces come in contact with eachother

Factors that determine friction

Weight of object, Area of Surface and Velocity/speed of the moving object

Where does Friction occur?

Friction occurs in air resistance, drag, grip

Usefulness of Friction

Braking, Walking and Building

Uselessness of Friction

Wear and tear of machinery, Makes things hot and can cause expenses due to replacing worn out parts

Ways to reduce friction

Smoother surfaces, Grease/Lubricant, Wheels/rollers and Stream Lining Shapes