Measurement

__Tuesday 29 March 2011__

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


 * calculate speed from measured distance and time
 * solve multiplication problems using doubling and halving strategies
 * use know multiplication facts to solve multiplication problems

(nzmaths.co.nz)

I estimated that I could run 11 kmph

After the test I discovered that I can run 13.9 kmph / 5.9 mps

Time taken for 100m = 17 seconds

I figured out that I could run 5.9 metres per second, I know that there is 3600 seconds in an hour so I multiplied 5.9 by 3600 and I got 21,240 metres and I rounded it to the nearest thousand, so my final answer was 21 kilometres per hour

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1. How many metres can a student travel by bike?

Estimation:

Speed: 31 kmph

Time: 2:30

Actual:

Speed: 20 kmph / 5.4 MPS

Time: 3.00

2. How many metres per second can a student travel by bike?

60 ÷ 3.00 = 20 kmph

1000 ÷ 180 = 5.6 MPS

I now know that to record speed in miles per hour, all you have to do is divide the distance traveled, by the time taken.

I am still unsure of, all of the factors involved, and what order to do all of the steps in, to get the correct answer.

I still need help with recording, how many metres per second an object travels.

The figure It Out activity was too difficult, for me to work out, I couldn't figure out any of the questions, besides the first one.

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