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MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig …………………………………………………. with Kerry Cue

September 3, 2014

Mathspig psychologist and pig

Hello Little Creatures,…………………………………………

,…………………………………………………………………………….

Here’s the BIG QUESTION:…………………………………

Is our maths teaching too safe?

Does this risk-averse teaching not only make maths boring, but encourage MATHS PHOBIA in children?

Pam Kent, President SAPPA

Pam Kent, President SAPPA

Pam Kent, President of the South Australian Primary Principals Association (SAPPA) writes that ‘risk-averseness looms large’ in teaching today, yet ‘current research strongly supports the notion of risk taking for effective learning’.

This research includes work by Ellen Sandseter, Professor of Early Childhood Education, Queen Maud Uni College, Norway.

Sandseter claims that children are born to take risks and this is how they learn to deal with such things as fear of heights. (See: Can playgrounds be to safe? John, Tierney, New York Times, 18 JUL 2011) If children do not tackle a fear of heights, say, they can develop a phobia.

To tackle Maths Phobia Mathspig has written a list of

42 Maths Things to Do before you are 12…………..

to get them:…………,…………………………………………

*outdoors…………..,…………………………………………

*thinking mathematically in the real world,

and *expose them to higher level maths………………..

Take No 21. Kids get this. As you get further and further away from the candle the sphere gets bigger so the brightness decreases. They don’t have to do the maths. But tell them ‘This is university maths, but very interesting’.

Mathspig No 21

candle intensity

As for No 37: How do you break your teeth playing pool? Well, if you leave your hand on the pool table or lean on the cushion the ball can cannon off the opposite cushion and run back up your arm and smash your teeth. (Ref. Mathspig’s brother)

pool table 2

Cheerio

 ……………………………………………………

Mathspig

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41 Maths things to do before you’re 12

September 1, 2014

Mathspig outdoor play quote

mathspig outdoor-play-app

A growing body of research shows us that outdoor play leads to better physical and mental health, has positive effects on cognitive function and learning, and reduces the incidence of behavioural problems.” Maria Zotti, Nature Play, SA.

Peter Dunstan, Principal Kilkenny PS, SA, writes in SAPPA magazine, Primary Focus, that outdoor play fosters “wonderment, independence and freedom” as well as “social skills, imagination, creativity and problem solving”.

Inspired by SAPPA and NaturePlay, which produced 51 Things to Do before you’re 12 Mathspig has produced her own outdoorsy maths list:

 Mathspig 41 maths things 1Mathspig 41 maths things 2mathspig 41 maths things 3

Mathspig 41 maths things 4mathspig 41 maths things 5

References:

7. Robin Hood Give us your best shot.

9. You can measure the volume of your lungs by blowing one breath into a balloon and pushing it into a full bucket of water. Measure the overflow.

15: Outdoor Maths: Times Tables

21. Light intensity links. Here and here.

25.  Sound Volume Measurement

36. Killer heels that really kill.

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MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig …………………………………………………. with Kerry Cue

August 19, 2014

Mathspig sidecar 2

Hellooooooooo Darling,

So who will be my stunt double when they make the film of my exciting maths life. I’m thinking

Miss piggy.

.

.

…Miss Piggy

………………………………………………………………………………..

babe.

.

.

.

…Babe

………………………………………………

While I’m deciding you might enjoy some Stuntman Maths as well as Stuntwoman Maths and Stunt pig Maths:

1. STUNTMAN MATHS: Car Stunts

2. STUNTMAN MATHS: Jumping off a Building

3. STUNTMAN MATHS: Motorbike Jump

And if you are a film buff you should check out my 10 Movie Cliches Debunked with Maths posts:

1.You can duck bullets.

 

2.You can out run a fireball.

 

3. You can out run machine gun fire

 

4. If you are involved in a car chase, hijacking, explosion, volcanic eruption or alien invasion, you will not go into shock.

 

5. You can jump out of an airplane that is about to crash and catch the baddie who took the last parachute.

 

6. If the pilot dies the control tower can talk you down.

 

7. You can safely jump from a burning skyscraper/bridge/aircraft into water.

 

8. You can survive any amount of beating in a fight.

 

9. A single match or candle will light a room the size of a football stadium.

 

10 You can out run a lava flow

……………………………………………………………..

Mauw Mauw

…………………………………………………….

Mathspig

 

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1. Stuntman Maths: Car Stunts

August 19, 2014

“With enough stupidity you can get any car to roll over” (MSN AUTO)

What stuntmen and women need is maths!

Maths is essential to the process, from calculating speeds and braking distances to looking at the ratio of the amount of film shot to the length of time of the end sequence. The stunt and crash is outlined, and the co-ordinator explains how he must calculate speeds and stopping distances carefully.

So you want to be a stuntman?

First think of the pain.

Mark Eiden, 52, a professional stuntman (pictured) who is not only afraid of heights, but was once told he likely wouldn’t walk again. Eiden’s had surgery on both arms and shoulders, five knee surgeries, six nasal reconstructions, foot and hand surgery and a facial cast. He fell off the top of a stunt car at 40 mph when the tyre blew. He gaffer taped his ear and continued, despite severe concussion. Northern Express Michigan

1 J Mark Eiden  Northern Express

If you still want to be a stuntman do the Maths:

Rolling a Car:

You can use quick handbrake turn, speed around a corner, fishtail into the curb or some other lunatic thing. The most controlled way to roll a car is to use a ramp.

ramp caranddriver.com

These ramps often have a kicker at the end to add extra lift. Ramp calculations can be complicated, but the simplest way to look at the maths is to determine the angle a car will roll ie. When the Centre of Gravity moves over the base.

Centre of Gravity vs Base Width

The distance between the front wheels in cars is often called the track width.

1a Centre of Gravity

2 Stable Couch3 SUV angleBase vs CofG SUVsTable from Accident Reconstruction Website

4 Bus Centre of Gravity

5 Small car centre of gravity

6 Lambogini Diablo Centre of Grvity

So the Lamobgini Diablo is very hard to roll (build a higher ramp) and it therefore beats the SUV for stability every time.

Balancing on 2 Wheels

A more skilled stunt involves driving a car on two wheels. A very skilled stunt driver can lift the car onto wheels by snaking the car back and forth across the road until it balances on 2 wheels.

From the Centre of Gravity vs Base angles above you can see that the SUV is the easiest car to balance of 2 wheels.

But there is nothing quite as crazy as this SUV stunt:

Saudis changing car tyres, just insane.

Picture 1

View full video here.

Safe Driving Info here

 

 

 

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2. Stuntman Maths: Jumping off a Building

August 19, 2014

The main concern when jumping out off a building is that the airbag (cardboard boxes) cover the drop zone.

The maths calculations involved in jumping off a building are straightforward. You might like to check out How Maths Solved a real murder.

Jump Height that Kills

It doesn’t take much of a fall to cause damage. Sean Hughes, professor of surgery at Imperial College, London. Says “From a height of 3m you could fracture your spine,” he says. “At around 10m, you’re looking at very serious injuries.” (The Guardian, 20 MAY 2014)

Stunt Jump from building from standing start

1 stunt jump from building

As this jump – as in most base jumps – involves a standing start:

2 Mathspig Jump off building

Airbagsupplies.

Stunt jump from building running

We will assume you are no Usain Bolt. His running speed, the fastest in the world, is 44.72 km/h (12.42m/s, 27.44 mph).

We’ll say your running speed on take off is:

Vy = 15 mph = 24.1 kph = 6.7 m/sec

3 Mathspig stuntman running jump

Don’t do this at home.

NB: Airbag dimensions: 20m x 20m x 4 m

Handstand of death

Would you jump off a 25 story building?

 

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3. STUNTMAN MATHS: Motorbike Jump

August 19, 2014

Star Stuntmen

Picture 2

Star Stuntmen Monte Perin (pictured) has involved many films, including “Spider-Man,” “Star Trek, “Indiana Jones and the Kingdom of the Crystal Skull” and portraying Arnold Schwarzenegger’s stunt double in “Terminator 3: Rise of the Machines.”

1. perlin_stunt_ Terminator 3

Perhaps his most difficult stunt was landing his Harley in an open boxcar of a moving train for Disney’s 2008 Adam Sandler movie “Bedtime Stories”. In a career of over 25 years Perin has broken “almost everything” including both his arms, legs, knees, feet, ankles, several ribs, his back and his pelvis. See Confessions of a stuntman

Veteran stuntman Evel Knievel (1938 – 2007) was the pioneer of many stunt jumps. Here he is jumping 10 cars and 3 vans in 1973.

2 Evel Knievel JUNE-23-1973

His injuries are legendary:

3 the-many-injuries-of-evel-knievel1

More Evel Knievel

Ramp Design

4 Ramp Design Angle of final kicker

The angle of the kicker in ramp design can vary from 100 – 700 (See below)

5 Robbie Maddison's 2008 New Year's Eve jump Arc de Triomphe at the Paris Las Vegas

Picture 2

 

Moto-X Ramp Jump Maths

6 motorbike -parabola  Mr Reid

7 bike jump 1 Method 1



8 bike jump Method 1 final

 

9 bike jump method 1 final

 

Picture 2


10 bike jump method 1 final

 

As any bike nut knows increasing speed and angle of take off will increase jump distance.

Here is a graph from final gear for speed vs angle to jump 90m.

12 optimising ramp angle

 13bike jump  Method 2

METHOD 1 is approximate (See STEP 1 & STEP 2 above), but as METHOD 2 produces the same ans (See above), it is very useful.

You will find a thoroughly detailed calc for STUNT JUMP MATHS here:

And everything you ever wanted to know about PHYSICS OF STUNT JUMPS here. 

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MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig …………………………………………………. with Kerry Cue

July 31, 2014

Mathspig Politicans maths

Hellooooooooo Sweeties,

Mathspig is always bemused that politicians (all shades), who struggle with maths of the economy, taxes and even their own expense accounts, suddenly become experts on how to teach maths.

Back to Basics is the current catch cry of politicians around the world … to win votes, of course. But what does it mean?:

Back to the 1950s?

With class sizes of 50, student reports stating ‘Margret was 33rd in the grade’ and the ‘strap’ waiting at the ready in the teacher’s desk draw.

Back to the 1960s?

When maths wasn’t taught to girls. (In Year 8 Mathspig went to a convent. The nuns only taught arithmetic.)

Back to the 1970s?

When the school curriculum was seen by some to be class-based patriarchal propaganda. Some schools stopped scoring football games to prevent the elitist paradigm spreading.

Today?

For some Back to Basics means Direct Instruction: a rigid, repetitious form of maths instruction when maths can be so much more. See Beware Maths Fundamentalists

Mathspigs Mission:

To make maths interesting, relevant and fun.

Here are some examples:

RATES:………………………………………………………………….

The Curious Nature of Drummers’ Brains

………………………………………………………………………..

% and LINEAR GRAPH:………………………………………

Hunger Games: How long does it take to bleed to death?

 ………………………………………………………………………..

PARABOLIC EQN:………………………………………………….

Hunger Games:  How much an arrow drops in 100m?

 ………………………………………………………………………..

GEOMETRY:………………………………………………………..

The raising of the Concordia

 ………………………………………………………………………..

PYTHAGORUS:…………………………………………………….

How Radar Works and the Search for a Ghost Ship

………………………………………………………………………..

Cheerio

Mathspig

 

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