Speed

Your mission is:

• Pair up – or jump in a 3, or do this individually – your choice (try your best to pair up)

• You will have a timer between you to share.

• 1. One person will time, the other will walk/run 100m

• When finished, record the time you took to run/walk.

• 2. Swap – the timer will now run 100m, the runner will now time.

• Make sure to record the time it took you to run/walk 100m!

• We will come back up here and calculate our speed!

Speed can be measured in:

•Kilometres per hour (km/h)

•Metres per second (m/s)

The formula triangle!!

To find distance, we

remove it from the

triangle

To find time, we

remove it from the

triangle

To find speed, we

remove it from the

triangle

Question

•Daisha drove her car 70km at an average speed of 35km/h – How long was the journey?

Distance = 70km

Speed = 35 km/h

• Time = distance ÷ speed

• Time = 70 ÷ 35

• Time = 2

• We have used the unit “kilometres per hour” so our answer is 2 hours

Question

• John missed the bus to had to walk home from school. It took him 2 hours. His average speed was 6km/h – how far away from school does John live?

Speed = 6km/h

Time= 2 hours

• Distance = speed x time

• Distance = 6km/h x 2 hours

• Distance = 6 x 2

• = 12 kilometres

Question

•Kritesh ran 100m in 9.58 seconds, what was his average speed?

Distance = 100m

Time= 9.58 seconds

• Speed = distance ÷ time

• Speed = 100 ÷ 9.58

• Speed = 10.43

• So Kritesh was travelling at 10.43 meters per second (m/s)