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October 22, 2014

October 22, 2014

Posted by **Mario** on Thursday, October 1, 2009 at 12:27pm.

- Physics -
**MathMate**, Thursday, October 1, 2009 at 6:15pmForce vector, F:

(2.3cos(100°),2.3sin(100°)) N

Displacement vector, D:

(3,4.4) m

Work done = F.D (dot product of the two vectors) J

A dot product between two vectors A(ax,ay) and B(bx,by) is a scaler calculated as

A.B = ax*bx + ay*by

See also:

http://en.wikipedia.org/wiki/Dot_product

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