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January 25, 2015

January 25, 2015

Posted by **jane** on Sunday, July 14, 2013 at 3:12pm.

- Elementary mechanics -
**MathMate**, Sunday, July 14, 2013 at 7:29pmUse the kinematics equation:

Vf=Vi+at

where

Vf=final velocity=i-2j (m/s)

Vi=initial velocity, yet unknown

a=acceleration=F/m (in vector form)

t=time=10 s

a=(2i+7j)/5=0.4i + 1.4j

Vf=(i-2j)+(0.4i+1.4j)(10)

=(i-2j)+(4i+14j)

=5i+12j

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