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anonymous
 one year ago
A gnat takes off from one end of a pencil and flies around erratically for 25.1 seconds before landing on the other end of the same pencil. If the gnat flew a total distance of 3.15 meters, and the pencil is 4.63 cm long, find the gnat\'s average speed, as well as the magnitude of the gnat\'s average velocity vector.
anonymous
 one year ago
A gnat takes off from one end of a pencil and flies around erratically for 25.1 seconds before landing on the other end of the same pencil. If the gnat flew a total distance of 3.15 meters, and the pencil is 4.63 cm long, find the gnat\'s average speed, as well as the magnitude of the gnat\'s average velocity vector.

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NotTim
 one year ago
Best ResponseYou've already chosen the best response.1The proper steps in doing any physics question are: Write down variables, draw your FBDs, and break it down into its x and y components.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Alright. So what would be what?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Because I've been doing it by division.

NotTim
 one year ago
Best ResponseYou've already chosen the best response.1http://www.smarterthanthat.com/physics/physicsdontpanic10stepstosolvingmostphysicsproblems/ starting at 4 or 5.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So do I need to subtract the two distances then divide by time?

NotTim
 one year ago
Best ResponseYou've already chosen the best response.1What's the difference between speed and velocity.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0velocity is a vector I think

NotTim
 one year ago
Best ResponseYou've already chosen the best response.1And what's the properties of a vector?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0derived. I know velocity is m/s

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So should I just ignore the 4.63 cm part and just stick with the 3.15 meters?

NotTim
 one year ago
Best ResponseYou've already chosen the best response.1Here's a big hint: 3.15 m is for the speed, and the velocity is directly related to 4.63 cm.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay so it would be 3.15m/ 25.1s then?

NotTim
 one year ago
Best ResponseYou've already chosen the best response.1Which one would that be solving for?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Because for the velocity you would take 3.15 *.0463/25.1

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay so it would be 3.15m/25.1s =.125 m/s?

NotTim
 one year ago
Best ResponseYou've already chosen the best response.1And what's that solving for?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that's solving for speed. The .125 m/s

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks for the help!

NotTim
 one year ago
Best ResponseYou've already chosen the best response.1(don't forget that velocity requires direction too)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Right. I think I got it. Thanks for your help!
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