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Introductory Physics Homework Help
Finding acceleration of a car when it is braking
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[QUOTE="Amelina Yoo, post: 5456056, member: 592089"] [h2]Homework Statement [/h2] A 1200kg car moving at 20 metres per second stops in a distance of 50m when the brakes are applied. a) What is the acceleration of the car when it is braking? b) Find the force applied by the car's braking system. [h2]Homework Equations[/h2] For a) I used the acceleration formula: a=(velocity - initial velocity)/t Time formula from rearranging: t=s/v [h2]The Attempt at a Solution[/h2] a) t=s/v t=50/20=2.5s velocity=50/2.5=20 metres per second a=(20-0)/2.5 = 8ms(^-2)[/B] I do not know how to find the acceleration when BRAKING, and the answer claims that it is 4ms(^-2.) As for b, I believe that I am unable to attempt it seeing as I am unable to find the acceleration. Please explain how to do it! I have read through the chapter of my textbook, and am unable to understand. thank you very much! [B][/B] [/QUOTE]
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Introductory Physics Homework Help
Finding acceleration of a car when it is braking
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