Archive for the ‘Junior School’ Category

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Winter Olympics: Beaten by 0.001 seconds

February 14, 2018

 

In 2014 Winter Olympics Annette Gerristen (below) lost the Gold Medal in the 1000 m Women’s speed skate competition by 0.02 seconds.

Annette Gerritsen fromthe Netherlands

Annette Gerritsen fromthe Netherlands

What are the speed skating times for women?

Women’s Speed Skating Calulations:

Here are the speed calcs for Yara Van Kerkhof of the Netherlands in the 2018 Winter Olympics:

If Yara lost the Gold Medal by 0.02 secs (2 hundredths of a second) what would the distance be between the Gold and Silver place getters?

When 1st and 2nd place are separated by 0.02 seconds, they are travelling at almost the same speed. So the second place contestant is:

23.8 cm behind the Gold Medalist

The 2018 Olympic Gold Medalist in the 500m Women’s Speed Skating was Arianna Fontana.

Italy’s Arianna Fontana wins the 500 m Speed Skating 2018 Olympic Gold Medal in 42.569 seconds ahead of Yara van Kerkhof of the Netherlands and Kim Boutin of Canada. 

Men’s Speed Skating:

At longer distances the men’s speed skating speed is similar to the women’s speed above.

If you lose by  0.001 secs…………

Apollo Ono (below) competed in the 1500m men’s speed skating. He has won 8 Olympic Medals.

If a speed skater lost the Gold Medal by 0.001 seconds, the smallest measured time segment at the Olympics, they would be:

1.19 cm

behind the winner. That is less than the length of a small fingernail.

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Survival Maths: Close encounters with Sharks

January 12, 2018

Drone’s Eye View: AWESOME!!!!!

Australia takes it’s sharks very seriously. Shark detecting drones are being trialled on beaches in NSW as a part of the NSW Government’s $16 million Shark Management Strategy. 

The film JAWS has given sharks a bad rap. Here are the STATS:

Deaths by shark attack in the world:

Australia       About 2 a year

USA               1 every 2 years 

UK                  None EVER

CANADA          None EVER

More deaths occur due to falling off chairs in Australia. Quad bikes are deadly anywhere. 

Full Stats and references here.

Meanwhile,  you see a shark fin. You can swim BUT what distance do you need to be from the shark to make it to the beach.

You will find some interesting maths here.

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2a. If all the cars in the world were parked together what area would they cover? Metric Units

November 28, 2017

*For the year 2015 by Statista here.

Area by Country

Area by State USA
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2b. If all the cars in the world were parked together what area would they cover? USA UNITS

November 28, 2017

*For the year 2015 by Statista here.

Area by Country

Area by State USA

………………….

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3. Middle School Madness: BIG MATHS

May 25, 2017

Mathspig loves this ‘Street Art’ time lapse clip made by projective geometry students at the Technical University, Munich. 

SO … thought Mathspig … lets do it! Two days later Mathspig’s eyes nearly crossed trying to locate the Vanishing Point (below), which helps artists draw 3D images. It didn’t work due to the angle of elevation of the camera. 

SO .. rethink needed. (See project 1 & 2 below)

Maths Meets Street Art:

Project 1

Students can draw this ‘hole in the earth’ by Circle/Line Art School on paper fairly quickly. The aim here is to practice 3D street Art.

Maths Meets Street Art:

Project 2: The BIG ONE

Students can draw this ‘concrete hole’ by MiltonCor on paper using a ruler, set square and pencils. Then they have to scale it up to a size large enough for them to sit on the steps. The class can the ‘concrete hole’  in chalk in the school yard. Basic shading only is required, not the shading detail shown in this video.

Finally, students can take a photo of themselves sitting on the ‘steps’ with maths books beside them. 

Another MATHS SELFIE!!!!

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Pi on TV

March 8, 2017

1.  The Simpsons

When Marge is accused of stealing from Apu’s Quickie Mart his memory is tested. He says his memory is very good. He can recite pi to 40,000 places!!! Also on Numberphile: A Mile of Pi.

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2.  The Late Show with David Letterman

Maths savant Daniel Tammet explains that he can recite Pi to 22,000 places. But wait until you hear how long it takes. Amaaaazing!!!!!

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3.  Star Trek

Spock sorts out a computer with the command to calculate Pi. Cool!!!!

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4.  Mathletics

Look for the second maths blooper in this clip. The folks at Mathletics get Pi wrong!!!!! Great spotting Mathologer.

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5.  MTV Kate Bush

Some may prefer to listen to Apu reciting Pi to 40,000 decimal places. Nevertheless, here is Kate Bush singing about Pi.

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The Simple Maths of a Car used as a Weapon … METRIC units

February 3, 2017
NIce Truck Attack 2016 The Independent, UK

Nice Truck Attack 2016 The Independent, UK

Berlin Christmas Maraket Attack 2016, ABC

Berlin Christmas Maraket Attack 2016, ABC

Melbourne Car Attack 2017

Melbourne Car Attack 2017.

Cars (and trucks) have been used as weapons by drivers purposefully driving into crowds including:

2014: Saint-Jean-sur-Richelieu, Quebec

2014 : Jerusalem, Israel.

2016: Nice, France

2016: Berlin, Germany

2017: Jerusalem, Israel

2017: Melbourne, Australia.

What does the maths tell us?

Melbourne is Mathspig’s home town. The car attack killed, tragically, 6 people and injured many more. The question many seem to ask is:

Why can’t people get out of the way?

Look at the video below of the Melbourne car. It doesn’t appear to be going that fast. But the maths tells a different story. You need quite a distance between you and a car travelling at approx 60 kph to have enough time to run clear. (See calculations below)

How fast do you react?

We will set your reaction time at 0.4 sec. This allows time for you to react and turn. If you want to test your reaction time go here. But remember you have to turn as well.

How fast would you run?

According to the Telegraph, UK, the average human can run at 15.9 mph (25.6 kph) and the National Council of Strength and Fitness 15 mph (24.1kph), which Mathspig has rounded off to 25 kph.

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How do you escape a car travelling at 60 kph towards you when you are less than 9 m away?

Jump upwards!

You might reduce the impact and even go over the roof.

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