Physics
Treveyanna
22

Claire starts driving with an initial velocity of 5.0 m/s towards north. She drives along a straight, level path with a uniform acceleration and travels 500. m in 20. seconds. A. What is the average velocity for the entire 20. seconds? B. What is the velocity at the end of 20. seconds?

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(2) Answers
Siemer305

s=ut+1/2at^2  500m=(5m/s*20s)+1/2(a*20^2) 500-100=1/2(a*400) 800=a*400 a=800/400 a=2m/s^2  v=u+at v=5+2*20 v=5+40 v=45m/s 

lilmisspippa

a) avg velocity=(v+u)/t =(500/20 +5)/20 =3/2m/s b) v=u +at =5+(25-5)/20 × 20 =25m/s

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