Work
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Key Questions

Answer:
#color(green)(W = F cos theta * d# , Newton meterExplanation:
F = Force, d = displacement
Work done = Force * Displacement
#W = vec F * vec d# Force and displacement are vector quantities
If both F and d are in the same direction,
#W = F * d# If force is exerted at an angle of
#theta# to the direction of motion, then work done#color(green)(W = F cos theta * d# Unit of work is Joule
1 Joule = 1 Newton meter = 1 N m

Answer:
Through an equation.
Explanation:
Work is represented by the equation,
#W=F*d# 
#F# is the force in newtons 
#d# is the distance moved in meters
Now, the distance moved is also the displacement of the object. If the object doesn't move, even if
#10# millions newtons of force was applied, there'll still be no work done.But, if an object moves, then work is done.


Answer:
Work done defined as the scalar product of the two vectors force and displacement.
Explanation:
If a force
#vecF# acts on a body and displaces it through#vecr# and the angle between the two vectors be#theta# . The work done by the force is given as,#W = vecF*vecr#
#implies W = FrCos theta# , where#F# and#r# are the magnitudes of#vecF# and#vecr# respectively.