9. Match the containers shown to the graph representing the change in depth over time as it is fi lled. Explain why you chose each graph.
(i) (ii) (iii)
A
y
B
y
C
y
x Time Time 10. Draw a distance/time graph to represent the following situation.
A driver gets into his car. He drives out of the car park, covering 25 metres in 5 seconds. Now on the main road, he travels 240 metres in 8 seconds. As the driver approaches traffi c lights, he slows down over 3 seconds, covering 35 metres. He comes to a complete stop. He waits at the traffi c lights for 4 seconds.
11. The container shown is fi lled with water at a steady rate of fl ow. Sketch a depth/time graph to represent the change in depth over time as the container is fi lled.
12. Katie walks from her house to her friend’s house which is 3 km away. This takes her 25 minutes. When she gets there, she must wait for 15 minutes for her friend to get ready. Then they walk to school which is a further 1 km from her friend’s house. This takes them 10 minutes.
Draw a distance/time graph for this journey.
13. Denis is carrying out an experiment which involves liquid being added to and removed from a test tube. The graph shown represents the change in depth of the liquid over time. Match the diff erent sections of the graph to the statements given.
y
(i) Some liquid is poured out quickly (ii) The test tube is emptied (iii) Liquid is added slowly (iv) The level of the liquid stays constant (v) Liquid is added quickly
Revision questions
14A Core skills 1. Convert the following lengths of time into the units shown in brackets in each case. (i) 513 minutes (hours and minutes) (ii) 2 hours and 12 minutes (minutes)