general test tips

Question 1

what is a way to find percentage uncertainty from a graph

Answer 1

• draw a worst line of best fit
• determine its gradient
• compare to true value
• calculate uncertainty

Question 2

what to ALWAYS watch for when using masses vs forces and work done

Answer 2

w = f = mg
so w = fx = mgx
NOT mx

Question 3

what to ALWAYS include when doing particles

Answer 3

ATOMIC NUMBER AND MASS NUMBER next to the symbol

Question 4

what to ALWAYS include when writing about electric fields

Answer 4

per unit POSITIVE charge