Physics is phun!

What is Speed?

• Speed in a given direction.

• A push or a pull on an object.

• The distance an object travels per unit of time.

I move a chair, the chair stops moving if I stop moving it

• First law

• Second law

• Third law

Why do we have to wear seatbelts?

• Inertia

• Gravity

• Force

How long will an object remain in rest?

• Until a force acts on it

• Until God wants

• Its not moving anyway....

An object in motion will stay in motion unless an external force acted on it. This is an example of

• First law of motion

• Second law of motion

• Third law of motion

Distance

• The total length travelled

• How far an object is from its starting point in a straight line

• Location of an object relative to a defined zero point

Displacement

• The total length travelled

• How far an object is from its starting point in a straight line

• Location of an object relative to a defined zero point

Displacement is distance combined with

• direction
• speed
• velocity
• magnitude

What is a difference between distance and displacement

• Distance is measured in seconds and displacement is measured in metres

• Distance is always shorter than displacement

• Displacement can be equal to zero if the object finishes back where it started

• Distance can be equal to infinite when only a small distance has been travelled

Which of the following describes distance and displacement correctly?

• The blue arrow shows distance and the orange arrows show displacement
• The blue arrow shows displacement and the orange arrows show distance
• Both arrows show distance only
• Both arrows show distance and displacement