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April 24, 2014

Homework Help: physics

Posted by july on Sunday, October 9, 2011 at 3:45am.

vector (V1) is 6.3 units long and points along the negative (X) axis. Vector(V2) is 9.0 units long and points at 55 degree to the positive (X)axis.

1- What are the (X) and (Y) components of (V1) vector ?

2-What are the (X) and (Y) components of(V2) vector ?

3-Determine the magnitude of the sum (V1+V2).

4-Determine the angle of the sum (V1+V2).


i've got the answers of the first three questions

1- 6.3,0
2- 5.2,7.4 units
3- 7.5 units
i tried putting tan-1 y/x
fot the 4th question but i've got the wrong answer
i need a help

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