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March 30, 2015

March 30, 2015

Posted by **Laura** on Sunday, May 22, 2011 at 6:52pm.

how long will it take a cyclist to bring a bicycle

with an initial speed of 14.5 m/s to a complete

stop?

Answer in units of s.

- Physics -
**Damon**, Sunday, May 22, 2011 at 7:16pmv = Vi + a t

0 = 14.5 - 2.2 t

t = 14.5/2.2

t = 6.59 s

next get the distance

x = Xi + Vi t + (1/2) a t^2

x = 0 + 14.5(6.59) - 1.1(6.59)^2

= 95.6 - 47.8 = 47.8 meters

wow, half a football field !

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