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 Feb 4th 2011, 10:53 PM #1 Junior Member   Join Date: Feb 2011 Posts: 2 Motion help Blah is riding a motorised scooter along a level bike path. The combined mass of blah and her scooter is 80 kg. The frictional and drag forces that are acting total to 45N. What is the magnitude of the driving force being provided by the motor if: a. She is moving with a constant speed of 10m/s b. she is accelerating at 1.5m/s^2 Just some direction / what formulas would do. Cheers
 Feb 5th 2011, 05:52 AM #2 Member   Join Date: Oct 2010 Location: Sri Lanka Posts: 63 since there are only two forces acting horizontally, a) use Newton's first law b) use Newton's second law to find the unknow force
 Feb 5th 2011, 06:33 PM #3 Junior Member   Join Date: Feb 2011 Posts: 2 So a) 45N b) 165N ? thanked. (:
 Feb 5th 2011, 07:54 PM #4 Member   Join Date: Oct 2010 Location: Sri Lanka Posts: 63 yes. I think you've got it right

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