Why is it Harder to Drive Backwards?

Why is it harder to drive backwards than forward

 

How fast are you moving right now? - Tucker Hiatt

View full lesson: http://ed.ted.com/lessons/how-fast-are-you-moving-right-now-tucker-hiatt

"How fast are you moving?" seems like an easy question, but it's actually quite complicated -- and perhaps best answered by another question: "Relative to what?" Even when you think you're standing still, the Earth is moving relative to the Sun, which is moving relative to the Milky Way, which is...you get the idea. Tucker Hiatt unravels the concepts of absolute and relative speed.

 Lesson by Tucker Hiatt, animation by Zedem Media.

 

Free falling in outer space - Matt J. Carlson

View full lesson: http://ed.ted.com/lessons/free-falling-in-outer-space-matt-j-carlson 

If you were to orbit the Earth, you'd experience the feeling of free fall, not unlike what your stomach feels before a big dive on a roller coaster. With a little help from Sir Isaac Newton, Matt J. Carlson explains the basic forces acting on an astronaut and why you probably shouldn't try this one at home.

 Lesson by Matt J. Carlson, animation by Josh Harris.

 

A trip through space to calculate distance - Heather Tunnell

View full lesson: http://ed.ted.com/lessons/a-trip-through-space-to-calculate-distance-heather-tunnell

 Imagine two aliens racing across outer space to their moon. Who can we deem the fastest alien? With DIRT -- or the equation Distance = Rate x Time -- we can calculate their rates, using the distance they traveled and the time they took. Heather Tunnell explains how to use this helpful equation to determine which of our alien friends is truly faster.

 Lesson by Heather Tunnell, animation by Karrot Animation.

 

Hewitt-Drew-it! 49.Satellite Speed

Paul shows how a satellite's orbital speed in close Earth orbit relates to Earth's curvature.

 

Hewitt-Drew-it! 35. RR Wheels

Paul links the linear-rotational speed relation to an explanation of why railroad trains stay on tracks via tapered wheel rims.

Other Hewitt-Drew-it! videos

Hewitt-Drew-it! 34. Circular Motion

Paul discusses his father working as a ticket collector in a merry-go-round and ties this to a Burl-Grey problem involving circular motion.

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Hewitt-Drew-it! 18. Acceleration Units

Paul clarifies the equivalence of m/s^2 and N/kg, and leads to Earth's gravitational field g.

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Hewitt-Drew-it! 15. Tennis-Ball Problem

Paul shows the solution to finding the maximum velocity of a horizontally-moving tennis ball that barely clears the net to remain in the court.

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Hewitt-Drew-it! 14.Ball Toss

Paul shows how the motion of a ball tossed by Phil Physiker can be carefully analyzed, with interesting distinctions.

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Hewitt-Drew-it! 11. Velocity Vectors

Paul extends a televised classroom lecture on vectors to explain the resultant velocities of airplanes in wind.

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Hewitt-Drew-it! 13.Sideways Drop

Bullseye Bob drops a bullet while firing another horizontally, then analyzed in Paul's televised classroom, followed up with vertical and horizontal motion independence.

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Galileo and Motion

Galileo studied the motion of objects rolling down an inclined plane, and made note of patterns in those motions which he extrapolated to the motion of falling objects.

Other animations by Penn State Schuylkill

Hewitt-Drew-it! 12.Free Fall

Paul investigates and develops free-fall equations as Phil Physiker drops a boulder, with a speedometer attached, from a high cliff.

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Hewitt-Drew-it! 10. Unit Conversion

Paul discusses unit conversion by means of cancellation, illustrated with a simple average-velocity problem featuring Fast Freda.

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Hewitt-Drew-it! 9. Bikes and Bee Problem

Paul shows a simple solution to a classic problem involving the motion of a bee that flies to-and-fro between approaching bikes.

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Hewitt-Drew-it! 8. Linear Motion Definitions

Paul links central kinematic definitions and equations to Barry Biker.

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Usain Bolt vs. Gravity

Who's faster over 10 meters - the fastest sprinter in the world, or gravity?

Other Minute Physics videos

Terminal Velocity

The terminal velocity of an object is the speed at which the force of drag equals the force of gravity on that object.

Other Sci-Show videos

 

Falling with Friction

With a low mass and a large surface area, the coffee filters reach terminal velocity very quickly. When a falling object reaches terminal velocity it stops accelerating and moves at constant velocity. Analyzed by Vernier Video Physics.
Kibae Lee, Tara Lamb, Caleb Williamson, Jessica Gales.

Other videos by St-Mary's High School