Physics Revision Unit 2 Only

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Unit 2 PHYSICS REVISION
FORCES:

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Front 2

A force can be a ? or a ?

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push or a pull

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What else can a force be?
(2 things)

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contact or non contact

Front 4

give 2 examples of a force that includes contact?

Back 4

pushes and pulls

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Give 2 examples of a force that does not include contact...non-contact?

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electromagnetic force and gravitational force

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What were Newton's ideas called?

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Newton's Laws of Motion

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What was Newton's 1st Law Of Motion?

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'An onject will stay at rest or at a steady spead unless a force acts upon it'

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Distance Time Graphs:

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Front 10

What is happening at 0-A?

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straight line travelling at steady spead

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what is happening at A-B?

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It has stopped

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what is happening at B-C?

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steady speed

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Is 0-A or B-C faster?
How can you tell?

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B-C
the gradient is higher

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speed=?
_____
?

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distance
__________
time

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When finding a speed, what MUST your answer be in?

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m/s this means miles per second. How many miles travelled in a second.

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Answer to this Distance Time Graph:

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Front 18

Rule one.
What does the Gradient of a Distance-Time graph show?

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the speed

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What does O-A show?

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constant acceleration

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what does AB show?

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steady spead

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what does BC show?

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constant deceleration

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Acceleration equation.........
change in speed
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?

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time it took

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Answers for acceleration MUST be in?

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m/s squared
means m/s/s

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for short the equation for acceleration is:

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.

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Rule 2: the gradient of a speed-time graph gives the?

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acceleration

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Rule 3:
the area under a speed-time graph gives?

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distance travelled

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When an object is moving, its speed describes how? it's travelling.

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fast

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Its movement can be plotted on a ?

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distance-time graph

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when the graph is straight, the object is moving at a ? spead

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constant

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where the graph is horizontal, the object is stationary. the? the slope of the graph, the? the speed

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steeper
greater

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Which graph shows an object that moves at a steady speed to start with then slows to a stop?

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c

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which graph shows an object that's moving at a steady spead faster than all the others?

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B

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Which graph shows an object that's moving at a steady speed slower than all the others?

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D

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which graph shows an object that's stationary to begin with and moves away at a steady spead?

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A

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MEASURING SPEAD:

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Front 41

eg: if the disance=31m
and the time=5.59
s=d
___
t
=31
_____
5.59
=5.56m/s

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this is how it MUST be set out and 1 mark is for the units m/s and 1 is for correct calculation and 1 mark for s=d
____
t

Front 42

speed is measured in?

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m/s

Front 43

complete the following equations:
1. d=25m
t=45.66

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s=d
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25
____
45.66
=0.55m/s

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answer can only have same amount of digits as qn, after decimal point...eg>

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25m
0.55m/s

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convert into seconds when finding distance!

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350x(5x60)=300

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acceleration answer can be?

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negative

Front 47

these triangles can help:

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