Chapter 1: Foundations of Physics

Question 1

what is the base unit for Speed

Answer 1

metres per second ms^-1

Question 2

what is the base unit for Acceleration

Answer 2

metres per second squared ms^-2

Question 3

what is the base unit for Force

Answer 3

kilograms metres per second squared kgms^-2

Question 4

what is the base unit for Work

Answer 4

kilograms metres squared per second squared kgm^2s^-2

Question 5

what is the base unit for Power

Answer 5

kilograms metres squared per seconds cubed kgm^2s^-3

Question 6

what is the absolute uncertainty formula

Answer 6

absolute uncertainty = range / 2

Question 7

what is the percentage uncertainty formula

Answer 7

percentage uncertainty = (Abs Unc / Mean) x 100

Question 8

what is the uncertainty rule for adding or subtracting

Answer 8

> If you add or subtract the two values you add the uncertainties

Question 9

what is the uncertainty rule for multiplying the absolute uncertainty

Answer 9

> If you multiply one value with absolute uncertainty by a constant the absolute uncertainty is also multiplied by the same constant

Question 10

what is the uncertainty rule for multiplying the percentage uncertainty

Answer 10

> If you multiply or divide two(or more) values each with an uncertainty you add percentage uncertainty to get total percentage uncertainty

Question 11

what is the uncertainty rule for powers

Answer 11

> If you square a value multiply percentage uncertainty by 2. If you cube a value you multiply percentage uncertainty by 3 etc