Q. 114.5( 40 Votes )

A body constrained to move along the z-axis of a coordinate system is subject to a constant force F given by



Where are unit vectors along the x-, y- and z-axis of the system respectively. What is the work done by this force in moving the body a distance of 4 m along the z-axis?

Answer :

Given,

Force, N


Displacement, m


Work done, W =


So, W =


W = 3×4


W = 12 J


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