What is a physical quantity?
Something that can be measured
The size of a numerical value
A measurement with no units
What does 'magnitude' mean?
What is a scalar quantity?
A physical quantity that has magnitude and an associated direction
A physical quantity that has an associated direction only
A physical quantity that has magnitude only
What is a vector quantity?
Which of these is a scalar quantity?
Displacement
Velocity
Speed
Which of these has a size and a direction?
Distance
Which of these is a vector quantity?
Distance travelled
Temperature
Which of these is NOT a vector?
200 m west
20 km
2 m upwards
Which of the following best describes the motion of a body moving in a circular orbit?
The speed is constant but the velocity of the body is continually changing
The velocity is constant but the speed is constantly changing
The speed and the velocity of the body are both continually changing