IGS Ph Motion Revision 01

Uncertainties in measurements affect all measurements. Some uncertainties are "random uncertainties" with no pattern. Some uncertainties are not random, they do have a pattern to them.

What's the name for such uncertainties?

What is 3 km expressed in metres?

What is 1.2 km expressed in metres?

What is 300 millimetres expressed in metres?

What is the uncertainty in these repeat readings of time?

8.0 s

10.0 s

9.0 s

Include the unit.

What is the name for a quantity that has both magnitude and direction?

Which typical speeds are AQA's values?

• Walking 3 m/s

• Running 3 m/s

• Cycling 10 m/s

• Cycling 6 m/s

• Running 8 m/s

What's AQA's typical value for the speed of walking (in metre per second)?

How would you calculate the gradient of the BC part of this graph?

• ³⁰/₆

• ¹⁰/4

• 10 × 4

• 30 × 6

What does the gradient of a distance-time graph represent?