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April 19, 2014

April 19, 2014

Posted by **Oriana** on Sunday, December 12, 2010 at 2:34pm.

- Physics -
**MathMate**, Sunday, December 12, 2010 at 2:50pmFirst find the acceleration from

u = 50km/h = 50*1000/3600 m/s = 13.89 m/s

to

v = 0 m/s

through a distance of

S = 74 cm = 0.74 m

v²-u^sup2;=2aS

a = (v²-u²)/2S

=-13.89²/(2*0.74)

= 130.34 m/s² (approx. 13g)

F=ma

=43 * 130.34 N

= 5604.6 N

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