# Unit 2

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If something has velocity, it has both…
speed and direction
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Speed and velocity are both measured in…
m/s (or km/h or mph)
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What is speed?
how fast you're going (e.g. 30mph or 30 m/s) no regard to direction
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What is velocity?
How fast you're going with the direction specified (e.g. 30 mph north)
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What does the gradient of a distance time graph tell you?
How fast your object is travelling. The gradient is the change in distance (vertical axis) divided by change in time (horizontal axis)
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speed
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What are the flat sections?
Where it is stationary
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Straight uphill or downhill means…
it's travelling at a steady speed
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The steeper the graph the…
faster it is going
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Downhill section means…
It's going back towards it's starting point
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Curves represent…
Acceleration or deceleration
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A steeping curve means…
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A levelling of curve means…
It's slowing down ( decreasing gradient)
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How do you work out the speed from a distance-time graph?
Vertical (divided by) horizontal
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What is acceleration?
How quickly the velocity is changing
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Change in velocity in acceleration can be…
Change in speed or change in direction or both
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Acceleration formula
Change in velocity (divided by) time taken
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Acceleration triangle
(v-u)/ a x t v= final velocity u= Initial velocity
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Unit for acceleration…
m/s (small 2)
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In a velocity time graph, the gradient equals…
acceleration
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Flat sections represent…
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## Other cards in this set

### Card 2

#### Front

Speed and velocity are both measured in…

#### Back

m/s (or km/h or mph)

What is speed?

### Card 4

#### Front

What is velocity?

### Card 5

#### Front

What does the gradient of a distance time graph tell you?