Topic 2 - Textbook Extras

Question 1

What are the 5 Base Units? (There are 7 but 5 is the ones that are useful)

Answer 1

• Second / s - Metre / m - Kilogram / kg - Kelvin / K - Ampere / A

Question 2

What are the Derived Units for Force?

Answer 2

kg m s*-2

Question 3

What is the unit for Power in SI Base Units?

Answer 3

kg m*2 s*-3

Question 4

What is the unit for Work (Energy) in SI Base Units?

Answer 4

kg m*2 s*-2

Question 5

What is the unit for Electric Charge (Q) in SI Base Units?

Answer 5

A s

Question 6

What is the unit for Potential Difference in SI Base Units?

Answer 6

kg m*2 A*-1 s*-3

Question 7

What is the unit for Resistance in SI Base Units?

Answer 7

kg m*2 A*-2 s*-3

Question 8

What is the Multiplier for the Prefix - Mega?

Answer 8

x10*6

Question 9

What is the Multiplier for the Prefix - Kilo?

Answer 9

x10*3

Question 10

What is the Multiplier for the Prefix - Milli?

Answer 10

x10*-3

Question 11

What is the Multiplier for the Prefix - Micro?

Answer 11

x10*-6

Question 12

What is the Multiplier for the Prefix - Nano?

Answer 12

x10*-9

Question 13

What is the Multiplier for the Prefix - Pico?

Answer 13

x10*-12

Question 14

What is a Vector?

Answer 14

Vectors have both magnitude and direction

Question 15

What are Scalars?

Answer 15

Scalars have only magnitude but no direction

Question 16

Examples of Vectors?

Answer 16

• Displacement - Velocity - Weight

Question 17

Examples of Scalars?

Answer 17

• Distance - Speed - Mass

Question 18

Formula for Vectors working along the same straight line?

Answer 18

Resultant = F1 + F2 Or F1 - F2

Question 19

How do you find the magnitude and Direction to resolve 2 Vectors perpendicular to each other?

Answer 19

Use Pythagoras to calculate the magnitude A² = B² + C² To find the angle use Trigonometry Tan θ = Opposite / Adjacent

Question 20

What should you consider when trying to resolve a Vector?

Answer 20

Split them into their different directions, POSITIVE and NEGATIVE

Question 21

What happens if you are drawing out Vectors and you end up back where you started?

Answer 21

Happens when the resultant is zero, is the case for a system of forces acting on an object in equilibrium.

Question 22

What is Mass?

Answer 22

Is the amount of matter you contain, kilograms (kg)

Question 23

What is Weight?

Answer 23

Weight is the force of gravity pulling you down. Newtons (N)

Question 24

What is the Weight Equation?

Answer 24

Weight = Mass X Gravity

Question 25

Finish the sentence - Opposite Charges…

Answer 25

Attract

Question 26

Finish the sentence - Like Charges…

Answer 26

Repel

Question 27

When does a Normal Contact Force exist?

Answer 27

Exists wherever two solid surfaces are in contact.

Question 28

What causes a Normal Contact Force?

Answer 28

• Due to electromagnetic forces acting between to atoms and molecules of two surfaces in contact.

Question 29

Show a Free-Body Diagram of a man standing on the Earth?

Answer 29

Question 30

How do you resolve these Vectors?

Answer 30