You will find TWILIGHT TV series Math **here**.

## Posts Tagged ‘algebra’

## VAMPIRES: a math horror story

March 6, 2019## Math Grafitti: The good, the bad and the OMG-That’s AMAZING!

March 1, 2019**We’ll start with the GOOD****Check out the graph**** here.**

**…. and the NOT SO GOOD.**

More information at **study.com**

**and the OMG-That’s-AMAZING!**

**Thanks to Slumfe on** **IMgur**

## This is why students HATE algebra

January 31, 2019So Mathspig is helping the kid next door with Grade 11 Math.

Here is the revision Q:

This is the sort of Q that makes students hate ALGEBRA. (Solution by Mathspig below)

POINTLESS

GRINDING

HEADACHE INDUCING

This equation looks like a chicken ran through some ink and ran across the page.

Why do so many MATH work sheets look like this?

The result:

**THE ALTERNATIVE**

One way to tackle a long and complexmath problem is to **defront the classroom** and solve it in groups.

# ALGEBRA Q from HELL SOLUTION

Here is the Q in orginal form:

NOTE: With a proof, you have to prove that one side of the equation

equals the other.

## 10. You can out run a lava flow … USA UNITS

November 17, 2018This is a rework of a **previous post** with full calcs.

Every volcano disaster movie from **Volcano** (1997) with Tommy Lee Jones to **Dante’s Peak** (1997) with Pierce Brosnan someone somewhere tries to out run a lava flow. Is this possible?

The answer is maybe. You will find everything you want to know about lava flows **here**.

On January 10,1977, at **Nyiragongo** lava sprang from the sides of the volcano moving at speeds up to 40 miles per hour. About 70 people were killed.

Measuring the temperature of lava. Photograph by R.L. Christiansen, U.S. Geological Survey, January 9, 1973.

The fastest Lava flows recorded were in Hawaiiin 1950 when Mauna Loa erupted. The lava traveled at 6 miles per hour through thick forest. But once the lava flows became established and good channels developed, the lava in the channels was flowing at up to 60 mph.

Speed of average sprinter = 10 – 15 mph

**Can you out run a lava flow?**

** You would be scorched in 33 seconds!!!**

## 10. You can out run a lava flow … METRIC

November 17, 2018This is a rework of a **previous post** with full calcs.

Every volcano disaster movie from **Volcano** (1997) with Tommy Lee Jones to **Dante’s Peak** (1997) withPierce Brosnan someone somewhere tries to out run a lava flow. Is this possible?

The answer is maybe. You will find everything you want to know about lava flows **here.**

On January 10,1977, at **Nyiragongo** lava sprang from the sides of the volcano moving at speeds up to 40 miles per hour (60 km/hr). About 70 people were killed.

Measuring the temperature of lava. Photograph by R.L. Christiansen, U.S. Geological Survey, January 9, 1973.

The fastest Lava flows recorded were in Hawaiiin 1950 when Mauna Loa erupted. The lava traveled at 10 kilometers per hour through thick forest. But once the lava flows became established and good channels developed, the lava in the channels was flowing at up to 97 kph.

Speed of average sprinter = 16 – 24 kph

**Can you out run a lava flow?**

**You would be scorched after 3 minutes!!!! **

## 3. Movie Stunt MATH: The Motorbike Jump

October 23, 2018# Star Stuntman

Star Stuntman 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

# Ramp Design

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

# Moto-X Ramp Jump Maths

The Problem?

If the ramp angle is too high, the stunt jumper also goes high, but doesn’t travel very far.

If the ramp angle is too low, the stunt jumper doesn’t stay in the air for very long and therefore doesn’t travel far. (see below0

The stunt jumper wants the OPTIMUM RAMP ANGLE.

**……………………………………………………………………………**

## METHOD 1: TRIGONOMETRY (cos we can)

As any bike nut knows increasing speed at ake off will increase jump distance.

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

## OPTIMISING RAMP ANGLE

**……………………………………………………………………………….**

# METHOD 2: MORE TRIGONOMETRY

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.

## How far does the tallest buidling in the world SWAY in an earthquake?

October 2, 2018**Earthquake Engineering Maths **

**Take 2:**

Structural Engineer Ron Klemencic explained on the Discover News that a simple rule of thumb for calculating skyscraper sway was to simply divide the buildings height in by 500 because the building codes demand the building fit a 1:500 sway ratio.

The tallest building in the world at 2,716 feet (828m), the Burj Khalifa, Dubai, would sway back and forth about 5.5 feet or 1.7 m.

**Ahhhhhhhhh! But you would have to drag Mathspig onto the 168th floor screaming.**

**But mathspigs you can work out the sway on the top ten tall buildings in the world.**