The main concern when jumping 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.

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)

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

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:

V_{y }= 15 mph = 24.1 kph = 6.7 m/sec

Don’t do this at home.

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

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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.”

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.

His injuries are legendary:

More Evel Knievel

The angle of the kicker in ramp design can vary from 10^{0} – 70^{0} (See below)

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.

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.

]]>According to **‘Bored Out of Their Minds’,** an article by ZACHARY JASON in The Harvard Ed Magazine (2017):

**Boredom accounts for nearly a third of the variation in student achievement. **

**Half of high school dropouts cite boredom as their primary motivator for leaving.**

Boredom begins for Math students at Grade 6 when students (Common Core Standards, USA) tackle more abstract concepts such as linear eqns, exponents, probability, geometry and so on.

Math curriculums in the USA, UK & Australia all demand students solve REAL LIFE problems. Too often these are of the type:

Q. Ronaldo has tethered his goat on a 12ft rein in the corner of a 20ft square field. What area can the goat graze?

**THE ANS: Who cares?**

Students really don’t care about Ronaldo’s goat, but here are some questions which involve intriguing answers they might want to work out. And many of these questions involve funny or age-relevant activities, which also helps engagement.

**1. Mean, Median STATS:** **Mean, Median and Coffee: Busting an Urban Myth**

**2. Parabolas: ****Can you beat the 12-14 yo World Record for a Watermelon Pip spit?**

**3. Geometry:** **Build a Freestanding Tower**

**Rates (Speed) & Units:**

**4a.** **The Terrifying Math of Running from a bear**

**5. Decimals, %, Volume:** **What Volume of alcohol is lethal for teens?**

**6. Decimals, Algebra, Weight Units**

**How much blood can a kid lose and survive?**

Graph **Hunger Game Math**

**7. GEOMETRY. Angles**

**Any Topic:**

**8.** **Middle School Math Photo Scavenger Hunt**

Space Math Song** here**

**EVEN TEACHERS GET BORED!!!**

The average time it takes **an audience at a conference** to switch off is 11 minutes. Keep in mind this audience is, at least, being paid to be bored witless.

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**This fab idea comes from Juliet Robertson, an outdoor education consultant in Scotland. ****Her blog Creative star learning is one of the most inspiring outdoor maths blogs you will find.**

Check out Mathpig’s protractor joke here.

**Another fab idea from Juliet Robertson.**

** **

**Lego Man soccer fields will vary in size depending on the height of each player picked by each student. This does your head in. It is really challenging maths!**

**McGill Uni link here.**

Don’t forget to throw in Mathspig’s lame protractor jokes.

**You’ll find full calculations at the Maths is Fun blog.**

**You’ll find more fab outdoor junior and middle school maths activities at the terrific Maths and Movement blog.**

**Some students will discover their co-ordinate point is not on the grid. Students should then work out that they will need a different scale for the y-axis. You can get more inspiration at the Stand Again blog.**

This idea comes from Burkard and Giuseppe @ the fabulous MATHOLOGER channel. Students can make a pattern called a cardioid that pops up all over math according to Burkard.

Follow these steps. There is a pdf file below the first diagram for printing exercise sheets.

And then watch the MATHOLOGER video for a really interesting explanation.

**x2 Tables on a Circle pdf file for printing**

**This circle graph blank could also be used for x3 and x4 tables, ****which produce totally different yet equally amazing patterns.**

Halfway there, now it gets tricky. +52 to each point on the circle and keep multiplying by 2.

ie. 27 x 2 = 54, 28 x 2 = 56 and so on.

so 0 = 52, 1 = 53, 2 = 54, 3 = 55, 4 = 56 etc

This shape is called a CARTIOID.

]]>**Tragically, 5 people have been killed by falling trees in Victoria, Australia, this Winter. **

**In 3 separate accidents, 4 died when trees crushed the occupants in cars. One victim was a pedestrian.**

**So if you were walking through a park could**** you escape a falling tree if you either heard a cracking sound or saw the tree starting to fall?**

**With thanks to Physics Stack Exchange.**

**For an inverted pendulum near the top of its arc, there is no period, but the quantity ****√ℎ/𝑔 does represent a characteristic time scale for this system. The tree will take a few of these characteristic times to fall.**

**Mathspig hates seeing an old tree felled, but it does give us the necessary time data.**

**There are many assumptions in these calculations.**

***You’d be hit by the tree trunk, not a branch which would hit you sooner.**

***There is no wind pushing the tree over.**

***The tree falling is an approx to a reverse pendulum.**

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ANS: He’ll stop at nothing to avoid them.

ANS: A roamin’ numeral.

ANS: Probably.

Here is a classic MATHSPIG JOKE:

And while we are being crazy cool kids here is a TED Talk on Mathematicians Dancing. I would call this a Mathfail because these guys DO NOT look as though they are having fun. Or, maybe, just maybe, the success of a joke or a dance is all in the delivery.

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**The Equation that tried to stump the internet!** New York Times

**Discovery Magazine: **Home Made Ice Cream

More ice cream science: the scoop baking

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