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August 29, 2014

Homework Help: Physics

Posted by Abraham on Saturday, October 6, 2012 at 6:23pm.

A force
F =

(5i − 4j)

N
acts on a particle that undergoes a displacement
Δr = (5i+j)m .
(a) Find the work done by the force on the particle.

(b) What is the angle between F and Δr?

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