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December 21, 2014

December 21, 2014

Posted by **jo147** on Sunday, July 1, 2012 at 5:05am.

1.change in speed,

2.change in velocity and magnitude of change in velocity ,

3.average acceleration and its magnitude .

- science -
**ajayb**, Sunday, July 1, 2012 at 9:33am1) change in speed: 12-5 = 7m/s

2) V1=5i & V2=12j

Change in vel.= V2-V1 = 12j-5i

its magnitude = sqrt(12^2+5^2)

= 13m/s^2

3) x-dir.: 0=5+Ax*5 => Ax= -1m/s^2

y-dir.: 12=0+Ay*5 => Ay= +12/5=2.4m/s^2

So A = -1i+2.4j

Mag. of av. acc.=sqrt(Ax^2+Ay^2)

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