OCR AS Physics - Mechanics and Materials

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  • Created by: Mal
  • Created on: 19-03-14 13:27

Pages in this set

Page 1

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Intoduction
There are 40 Mechanics
definitions which you
need to learn and
practice recalling.
These are all listed in
these slides.

Other SmartphonePhysics
resources give you more
background detail on each.

Page 2

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Components
The components of a
vector are any two
mutually perpendicular
vectors whose vector
sum is equal to the
original vector.

Page 3

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Resultant
The answer to a vector
sum of two or more
vectors.

Page 4

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Distance
The length of the path
travelled from an
object's starting
position to its final
position.

Unit: m

Page 5

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Thinking
Distance
The distance travelled
(at constant velocity) in
the time it takes the
driver to react.

Unit: m

Page 6

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Braking
Distance
The distance travelled
by the vehicle from
when the brakes are
firstly applied until it
stops safely.

Unit: m

Page 7

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Stopping
Distance
The sum of the
Thinking Distance and
the Braking Distance.

Unit: m

Page 8

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Displacement
The length AND
direction of a straight
line drawn from an
object's starting
position to its final
position.

Symbol: s Unit: m
(if required, degrees are used
for the direction)

Page 9

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Instantaneous
speed
The gradient of a
tangent drawn on
distance vs time graph.

Symbols: u, v
Unit: ms-1

Page 10

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Average speed
The total distance
travelled divided by the
total time taken.

Unit: ms-1

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