Chapter 2

Question 1

Base units for electricity

Answer 1

Amps

Question 2

Base units for length

Answer 2

Metre symbol m

Question 3

Base units for mass

Answer 3

KG,

Question 4

Bas units for time

Answer 4

Seconds

Question 5

Base units for temperature

Answer 5

K

Question 6

Base units for amount of substance

Answer 6

Mol

Question 7

Hard prefixes you need to know

10*15/-15?

Answer 7

PETA = 10*15
Tera= 10*12
Giga
Mega
Kilo
Deci = 10*-1
Centi = 10*-2
Mili
Micro
Nano 
Pico= 10*-12
FEMTO = 10*15

Question 8

Adding vectors?

Important for perpendicular
NON PERPENDICULAR

Answer 8

If parallel, add them together
If perpendicular, use PYTHAGOREAN to give MAGNTIUDE AND THEN TRIG FOR DIRECTION, VECTORS HAVE BITH SO NEED TRIG

2) SPLIT INTO COMPONENTS, THEN FIND ANGLE.
- COSINE + SIN RULE TOO

Question 9

What is cosine rile then

Answer 9

a2= b2 + c2 - 2bc COSA, where A is angle obvisukh

Question 10

WHAT DOES RATE OF CHANGE MEAN!

Answer 10

Final - initial calm

OVER TIME!

Question 11

Current and charge symbols

Answer 11

Current =A

Charge = Q

Question 12

Remember for directions in resultant forces !

Answer 12

!

Question 13

WHAT TO DO IF LESS THSN 3 ORDERS OF MAGNITUDE LESS?

Answer 13

IGNORE, just use other component but stil, state horizontal direction

Question 14

IS POWER SCALAR OR VECTORE?

Answer 14

Scale , even though wd = force x distance this is scalar

This because force can only happen one direction

Moment in the other hand gives rise to a direction so that is vector