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Physics Paper 2
Motions
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Cards (70)
What are the two types of quantities discussed?
Scalar and
vector
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What is a scalar quantity?
It has only
magnitude
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What is a vector quantity?
It has both magnitude and
direction
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Is speed a scalar or vector quantity?
Scalar
quantity
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Give an example of speed.
A person running at 4
m/s
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Is velocity a scalar or vector quantity?
Vector
quantity
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Give an example of velocity.
A person
cycling
6 m/s east
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Why is it common to confuse speed and velocity?
Both are related to
motion
but differ in direction
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What is distance considered as?
Scalar
quantity
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What is displacement considered as?
Vector
quantity
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What is the difference in units between speed and velocity?
Velocity includes
direction
, speed does not
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What does the letter 's' represent in the velocity equation?
Displacement
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What does the letter 's' represent in the speed equation?
Speed
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What does 'd' represent in the speed equation?
Distance
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What does 't' represent in both equations?
Time
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Why do people often use the velocity equation incorrectly?
They may not have a
direction
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What is average speed?
Total
distance
divided by total time
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What is average velocity?
Total
displacement
divided by total time
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What are typical walking, running, and cycling speeds in m/s?
Walking: 1.5 m/s
Running:
3
m/s
Cycling
: 6 m/s
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What are typical speeds for vehicles in m/s?
Car: 25 m/s
Fast train
: 55 m/s
Plane: >250 m/s
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What is the speed of sound in air?
330 m/s
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How does the speed of sound change in different mediums?
It varies depending on the
medium
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What factors can affect wind speed?
Temperature,
pressure
, and structures
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What can wind speed vary from?
Almost 0 m/s to >
train speed
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What happens to the speed of objects during their journey?
It can
vary
along the journey
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What is the benefit of using velocity?
You can represent
backward
motion
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What is acceleration defined as?
Rate of
change
in velocity
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How is acceleration measured?
In
meters
per second squared
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What does the delta sign (Δ) represent?
Change
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How can change in velocity (Δv) be expressed?
As v
minus
u
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What is the formula for calculating acceleration?
Acceleration = change in
velocity
/ time
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What does a negative acceleration indicate?
Object is
slowing
down
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What is uniform or constant acceleration?
Acceleration remains the
same
over time
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What additional variable is included in the second acceleration equation?
Distance
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When should you use the second acceleration equation?
When given the unit of
distance
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What is the initial velocity (u) of an object that starts from stationary?
Zero
meters per second
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How does the acceleration of the ball relate to its final velocity?
Acceleration affects how
fast
it falls
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What is the significance of the calculated height of 2.5 meters?
It is the height from which the ball was
dropped
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What do distance-time graphs allow us to visualize?
How
far
something has traveled over
time
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What does the gradient of the line on a distance-time graph represent?
The
speed
of the object at that time
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