Term 1 Review: position & velocity graphs

What is a vector quantity

• a quantity that has magnitude (size)

• a quantity that has direction

• a quantity that has magnitude or direction

• a quantity that has magnitude and direction

What is the significance of a negative vector?

• It's less than 0

• It's in the opposite direction to motion

• It's in the opposite direction to the direction we chose as positive

• It's in the same direction as the direction we established as positive

On this POSITION-TIME graph...

• The x-axis represents the speed

• The x-axis represents the position or displacement

• The y-axis represents the speed

• The y-axis represents the position or displacement

On this POSITION-TIME graph...

• The x-axis represents the time

• The x-axis represents the speed

• The y-axis represents the time

• The y-axis represents the speed

On this graph, the flat line from 100 to 110 mins...

• means the object is not moving

• means the object is moving with a constant positive speed

• means the object is moving with a constant negative speed

On this graph, the positive gradient lines from 0 to 50 mins...

• mean the object is not moving

• mean the object is moving with positive speed

• mean the object is moving with positive velocity

• mean the object is moving with negative speed

• mean the object is moving with negative velocity

On this graph, the negative gradient line from 50 to 100 mins...

• means negative speed

• means negative displacement

• means negative velocity

At t=50 minutes...

• the object has a speed of exactly 30 meters per second.

• the object has a velocity of exactly 30 meters per second.

• the object has a displacement of exactly 30 meters.

Just after t=20 mins

• it speeds up

• it slows down

• it stops

• it starts moving backwards

After 50 mins...

• it speeds up

• it starts moving backwards

• both of the above