What's My Speed? (05:08)
Speed is the distance you travel divided by time it takes you to get there but there is never one answer to this question; speed is always relative.
How Fast Were You Going, Sir? (03:36)
In 1896, Walter Arnold received the first speeding fine for traveling 8 mph. The speed trap originated in New England; the first speed cameras appeared in 1905. Radar guns appeared in the 1950s.
What Makes a Sonic Boom? (03:39)
In 1887, Ernst Mach discovered that a whip creates a shock wave faster than the speed of sound. Experts explain how parts of a plane can go supersonic and discuss how light can create Cherenkov radiation.
What's the Fastest Way Around the World? (04:13)
In the 17th century, Robert Hooke determined the fastest way around the Earth was through the center; kinetic energy transfers into gravitational energy.
Why Doesn't the Moon Fall Down? (03:41)
Gravity and mass moves the Earth and Moon around each other in space. In 1687, Isaac Newton explained orbit in "Principia Mathematica"
Why to Cats Have Nine Lives? (04:16)
In 1987, more than 100 cats fell out of windows in New York, 9 out of 10 survived; cats have a non-fatal terminal velocity. In 1483, Leonardo Da Vinci created the first parachute.
Should I Run or Walk in the Rain? (03:54)
If there is no wind, the amount of rain that hits the top of your head and your front does not change if you run or walk, but running gets you out of the rain quicker.
Am I Faster than a T-Rex? (04:25)
Scientists devised two ways to try to determine the speed of a T-Rex. Experts discuss the scale of weight, height, mass and speed.
How do You Stop a Flu Epidemic? (04:30)
The basic reproductive ratio dictates the infectiousness of a disease. The average rate for transferring the flu is 1.8. Vaccinations significantly reduce a disease outbreak.
How do I Dodge a Natural Disaster? (05:04)
Experts explain the ways that hurricanes, tsunamis, avalanches, and astroids move and consider possible ways to avoid their devastation.
Credits: Things You Need to Know…About Speed: James May's Things You Need to Know (Series 2) (00:36)
Credits: Things You Need to Know…About Speed: James May's Things You Need to Know (Series 2)
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