# A Basic Acceleration Example Problem and Understanding Acceleration Direction

By Flipping Physics, 05/21/2014
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This video starts with a simple acceleration problem and then addresses a commonly held misconception that a negative acceleration always means you are slowing down. I do this by way of examples. Kate (my wife) drove the Prius with a camera suction cupped to the window and videoed me riding my bike several times. In the end I ended up with four different examples on the screen at once and 25 different video layers to describe it all. I am really proud about how well it worked. Enjoy.

Content Times:
0:40 Seeing the problem
1:14 Translating the words to Physics
1:54 Solving the problem
3:50 Why is the number on the bike positive?
4:48 How can the bike be speeding up if the acceleration is negative?
5:50 Comparing velocity and acceleration directions
7:28 All four bike examples on the screen at the same time
7:53 Why isn't there a direction on our answer?
8:51 Outtakes or how the bike riding was filmed

[url="http://www.flippingphysics.com/a-basic-acceleration-example-problem-and-understanding-acceleration-direction.html"]Want Lecture Notes?[/url]

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[url="http://www.flippingphysics.com/introduction-to-acceleration-with-prius-brake-slamming-example-problem.html"]Introduction to Acceleration with Prius Brake Slamming Example Problem[/url]

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