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DD03Video Analysis of Projectile Motion

Larry Dukerich - Arizona State U & Dobson HS

Dwain Desbien - Arizona State U & Chandler- Gilbert College

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Video analysis software- a useful tool

Clip from Physics of Sports

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Video analysis software- a useful tool

Slope = velocity

Slope = acceleration

Graphs from VideoGraph - PAS

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Video analysis software

Canned movies are OK, but… They’re someone else’s idea of interesting

motion. Students don’t get chance to produce and

examine parabolic motion on their own.

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Video capture - then

Expensive hardware requirements fast computers with video cards expensive, high-end VCR’s

Used to be difficult and tedious frame by frame capture dropped frames made analysis tricky

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Video capture - now, with iMac

Alt 1: VHS and video capture box Use low-cost iMac ($800) or USB G3 Mac Standard VHS camera or VCR MyVideo from Eskape Labs ($250)

www.eskapelabs.com

Avid Cinema software

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USB Video capture box

QuickTime™ and aPhoto - JPEG decompressor

are needed to see this picture.

Composite video signal from VCR or camera

Output to USB port

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Video capture - with iMac DV

Alt 2: Digital video input Digital camera and Firewire (IEEE 1394) iMac DV ($1000) iMovie software

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Digital video - iMac DV

QuickTime™ and aPhoto - JPEG decompressor

are needed to see this picture.

FireWire connector

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Producing QuickTime movies

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Physics - 2nd Quarter Project

Produce and analyze video of projectile motion. Teams of 3 - 4 students Done outside of class time Required minimal teacher intervention

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Sample student movies

Object of known length for calibration

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Sample student movies

Ashley & Lindsay - Girls’ soccer team

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Sample student movies

Garrett wanted to jump from the 2nd floor.

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Sample student movies

A boy and his dog

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Sample student movies

Not your typical basketball shot.

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Sample student movies

Restriction: no living thing may come to harm.

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Sample student movies

QuickTime™ and aVideo decompressor

are needed to see this picture.

Crash and burn!