How is work done by a force measured when the force: 1)is in the direction of displacement 2)is at an angle to the direction of displacement. plsss ans it soon!!!!
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See work done is given by F.r=Fr cos 
where F is force and r is the displacement. Obviosuly work depends on
AravindG:
the alpha so when in direction of force, alpha is zero means cos alpha maximum. So maximum work is done. When theta increases from 0 this work decreases from max value to 0 when alpha=90( because cos 90=0). I hope this helps. Let me know if you need further help.
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