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Video Discussion: A Basic Acceleration Example Problem and Understanding Acceleration Direction

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Name: A Basic Acceleration Example Problem and Understanding Acceleration Direction

Category: Kinematics

Date Added: 21 May 2014 - 08:53 AM

Submitter: Flipping Physics

Short Description: None Provided

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:

0:26 Reading the problem

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

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