1.

The average speed of a car which takes 2 hours to travel 160 km is .......

80 m/s

80 km/s

80 km/h

320 km/h

160 km/2 h = 80 km/h. Note how the units match those given in the question

2.

A car travels 20 km in 12 minutes. The speed in km/h is .......

0.2 km/h

100 km/h

120 km/h

240 km/h

12 minutes = 12/60 = 0.2 hours so 20 km/0.2 h = 100 km/h

3.

The speed of a cyclist who rides 300 metres in 25 seconds is .......

0.12 m/s

12 m/s

24 m/s

7,500 m/s

300 m/25 s = 12 m/s

4.

A bus takes 2 hours to travel 40,000 metres. The average speed of the bus in km/h is .......

2 km/h

20 km/h

33 km/h

200 km/h

40,000 m = 40 km so speed = 40/2 = 20 km/h

5.

A cyclist travels 900 metres in 1 minute. The speed in m/s is .......

9 m/s

15 m/s

30 m/s

900 m/s

1 minute = 60 seconds so speed = 900/60 = 15 m/s

6.

The speed of an athlete who runs 200 metres in 20 seconds is .......

0.1 m/s

10 m/s

10 km/s

4,000 m/s

200/20 = 10 m/s

7.

It takes an hour to walk 1,800 metres up a steep hill. The speed in m/s is .......

0.5 m/s

1 m/s

1.8 m/s

2 m/s

1 hour = 60 minutes = 3,600 seconds so speed = 1,800/3,600 = 0.5 m/s

8.

An athlete runs 1 km in 100 seconds. Her speed in m/s is .......

0.001 m/s

1 m/s

10 m/s

100 m/s

1 km = 1,000 m so speed = 1,000 m/100 s = 10 m/s

9.

A child walks 90 metres in 3 minutes. The speed in m/s is .......

0.3 m/s

0.5 m/s

3 m/s

5 m/s

3 minutes = 180 seconds so speed = 90/180 = 0.5 m/s

10.

The SI unit of speed is .......

cm/s

m/s

km/s

m/h

Speed is also measured in km/h, miles/h - you must make sure units are correct

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