Measurement

Exploring the concept of speed. Students will realise that speed is made up of two measurements, one of distance travelled, and one of time taken. These two measurements can be used to calculate speed, which can be converted to different units.

L.I. Students will be able to 1. use appropriate scales, devices & metric units for length, area, volume & capacity, weight (mass), temperature, angle and time. 2. convert between metric units, using whole numbers and commonly used decimals. 3. use a range of multiplicative strategies when operating on whole numbers. S.C. We will

(nzmaths.co.nz)
 * calculate speed from measured distance and time
 * solve multiplication problems using doubling and halving strategies
 * use know multiplication facts to solve multiplication problems

__Wednesday 30 March 2011__

My estimation for running km per hour is 10km per hour.

After test I discovered that I can run 14km per hour.

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__Thursday 31 March 2011__

1.What speed can a student travel by bike? Estimation: 18km per hour Actual: 19.672

2.How many meters per second can a student travel by bike? Estimation: 4m Actual: 5.4m per second.

I worked the first question out by going 60 ÷ 3.05 = 19.672

I worked this one out by going how many second in 3.05 and there are 185 seconds, then you go 185 ÷ 1000 = 5.4 meters per second.

Reflection:

I now know how to convert my answer into km per hour and seconds per hour.

__Friday 1 April 2011__

How many km per hour all the world record holders are going and meters per second.

100m

Men: 9.58 seconds: Usain Bolt 10.43 Mph || 44km per hour

Woman: 10.49 seconds: Florence Griffith-Joyner 9.53 Mph || 41.379km per hour

200m

Men: 19.19 seconds: Usain Bolt 10.42 Mph || 44km per hour

Woman: 21.34: Florence Griffith-Joyner 9.37 Mph || 41.095km per hour

1km Men: 58.875 seconds: Arnaud Tourant 19.98 Mph || 61.2km per hour

500m Woman: 34 seconds: Anna Meares 14.7 Mph || 55km per hour