C8.3 Speed

C8.3 Speed

How to convert units in calculating speed?

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1000 m = ? km

Fill in the number without the unit.

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1 m = ? km

Fill in the number without the unit.

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2 m = ? km

Fill in the number without the unit.

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1 min = ? s

Fill in the number without the unit.

Multiple Choice

1 s = ? min

• 1/60

• 60

• 3600

• 1/3600

Multiple Choice

1 s = ? h

• 1/60

• 60

• 3600

• 1/3600

Take out Workbook 1B p29 Q1

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Q1. The speed of a particle is 2 m/s.

Find the speed in kilometres per hour.

km/h

Fill in the number without the unit

Did you nail it?

• convert 2 m to 0.002 km (divide by 1000 as 1000 m = 1 km)

• convert 1 s to 1/3600 h (divide by 3600 as 3600 s = 1 h)

• Speed in km/h = 0.002 km / (1/3600 h)

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Redemption Question. The speed of a particle is 4 m/s.

Find the speed in kilometres per hour.

km/h

Fill in the number without the unit

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Q2. A car is travelling 66 km/h.

Find the speed in metres per second.

m/s

Fill in the number without the unit (Round off to 3.s.f.)

Did you nail it?

• convert 66 km to 66 000 m (multiply by 1000 as 1000 m = 1 km)

• convert 1 h to 3600 s (multiply by 3600 as 3600 s = 1 h)

• Speed in m/s = 66 000 m / 3600 s

• Speed in m/s = 18.3 m/s (3.s.f)

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Redemption Question:

A car is travelling 10 km/h.

Find the speed in metres per second.

m/s

Fill in the number without the unit (Round off to 3.s.f.)