Ch03 A-level Physics CIE

mass x acceleration

How to calculate resultant force

acceleration

Resultant force always points in the same direction as the ____________

mass

We can only use the equation F=ma when the ___________ is constant

accelerate

Mass is a measure of how difficult it is to ______________ something

SI

The name of the system of units we use in this course

base units

The name of the units from which all other units are derived

homogeneous

The word which describes any equation where both sides have the same base units

x10^-3

What does 'milli mean?

x10^-6

What does 'micro' mean?

x10^-9

What does 'nano' mean?

x10^-12

What does 'pico' mean?

x10^3

What does 'kilo' mean?

x10^6

What does 'mega' mean?

x10^9

What does 'giga' mean?

x10^12

What does 'tera' mean?

x10^-2

What does 'centi' mean?

x10^-1

What does 'deci' mean?

k

What is the symbol for 'kilo'?

M

What is the symbol for 'mega'?

G

what is the symbol for 'giga'?

T

What is the symbol for 'tera'?

d

What is the symbol for 'deci'?

c

What is the symbol for 'centi'?

m

What is the symbol for 'milli'?

μ

What is the symbol for 'micro'?

n

What is the symbol for 'nano'?

p

What is the symbol for 'pico'?

weight

The name of the force of gravity acting on an object

mass x gravitational field strength

The equation for weight

free-fall acceleration

Gravitational field strength is always the same value as...

An object will move at constant velocity, or remain at rest, when the resultant force acting on it is zero

State Newton's First Law of Motion

drag

The name of the force of friction when moving through a liquid or gas

increases

As the speed of an object increases, the drag force ____________

Terminal velocity

The name of the final speed reached by a moving object

Upthrust

The name of the force that tries to make you float

Tension

The name of the force in a stretched rope

When two objects interact, both objects experience a force. The forces have equal magnitudes but opposite directions.

State Newton's Third Law of Motion

Vector

Is weight a scalar or vector?

s, m, kg, A, K, mol, cd

All the SI base units

It has the same units on both sides

What it means for an equation to be 'homogeneous'

It is false

If an equation is NOT homogeneous then...

It might be true

If an equation IS homogeneous then...

A number and a unit

What two things MUST a physical quantity have?

Ignore them

What to do with numbers (like pi or 1/2) when finding out the units

They are the same

If you add or subtract two values, what do you know about their units?