7. Foundations. Displacement, velocity and acceleration

A one-dimensional measure of magnitude but not direction, defines what?

• Speed

• Velocity

• Scalar

• Vector

Identify the vectors

• distance

• displacement

• speed

• velocity

• acceleration

Identify the scalars

• distance

• displacement

• speed

• velocity

• acceleration

The statement defines what?

"The straight line distance between starting and ending position"

An athlete runs an 800m race what is their displacement?

• 0m

• 200m

• 400m

• 800m

Rate of change of distance defines?

• speed

• velocity

• acceleration

• displacement

 $=\frac{\Delta d}{\Delta t}$ 

• displacement

• speed

• velocity

• acceleration

Acceleration is the rate of change of velocity?

• True

• False

What happens if there is a negative acceleration?

• speeding up

• slowing down

• going backwards

• stopped

If Bolt did not do this in Beijing when running 9.69s would this have been quicker than his current WR of 9.58s?

• yes

• no