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Distance/Time Graphs
Distance
Distance
ed
pe
tS
an
Stationary Object Gradient = speed
st
n
Co
The steeper the graph,
the faster it's going.
An object moving at a
steady speed travels the
Time Time same distance every
second.
Distance
Distance
The steeper the line on
a distance-time graph
of a moving object, the
greater its speed is.
Object Speeding
Up (Accelerating)
Object Slowing Down
(Decelerating)
Time Time…read more

Slide 3

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Speed vs. Velocity
Speed
· Speed measures how fast you're going.
· It is measured in m/s.
Velocity
· Velocity measures speed in a given
direction.
· It is measured in m/s².…read more

Slide 4

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Useful Equations
Speed = Distance ÷ Time
D
S=D÷T
m/s = metres ÷ seconds SxT
e.g. Mary ran 200m in 40 seconds. What is
her speed?
200 ÷ 40 = 5m/s…read more

Slide 5

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Useful Equations
Acceleration is how quickly the velocity
is changing. Change
in
Acceleration = Change in Velocity ÷ Velocity
Time Taken
m/s² = m/s ÷ seconds Acceleration x Time Taken
e.g. A skulking cat accelerates steadily from 2 m/s to 6
m/s in 5.6 s.
What is its acceleration?
6­2=4
4 ÷ 5.6 = 0.71m/s…read more

Slide 6

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Velocity/Time Graphs
Velocity
Distance
n
t io
ra
le
ce
Steady Speed Gradient = acceleration.
Ac
Flat sections represent
steady speed.
The steeper the graph, the
greater the acceleration or
deceleration.
Uphill sections (/) are
Time Time acceleration.
Downhill sections (\) are
Distance
Distance
deceleration.
Distance = area of graph.
A curve means changing
acceleration.
D
ec
el
er
at
io
n
Increasing
Acceleration
Time Time…read more

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