Here are some car speeds and the distance it takes for a car to stop when it is travelling at this speed, e.g., at a speed of 20 kilometres per hour it takes a car 13 metres to stop when it brakes.
| Speed (kilometres per hour) | 20 | 40 | 60 | 80 | 100 |
| Stopping distance (metres) | 13 | 30 | 55 | 80 | 110 |
| a) | Using the data in the table complete the graph below. The first point is done for you. | |
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Car Speed and Stopping Distance  |
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b)
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Complete the sentence about stopping distance.
The faster a car is going the ... |
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| c) | i) |
If the road the car was travelling on was wet the stopping distance would (circle one)
decrease. stay the same. increase. |
| ii) |
Explain your answer to i).
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