Work, Power and EnergyHard
Question
The potential energy for the force 
= yzî + xaĵ + xy
, if the zero of the potential energy is to be chosen at the point (2, 2, 2), is
= yzî + xaĵ + xy, if the zero of the potential energy is to be chosen at the point (2, 2, 2), isOptions
A.8 + xyz
B.8 - xyz
C.4 - xyz
D.4 + xyz
Solution
∵ 
= - 
∴ 
= - xy
Therefore U = - xyz + C where C = constant As at (2, 2, 2), U = 0 so C = 8
OR
Objective question approach : Check that U = 0 at (2, 2, 2)
= - ∴ = - xyTherefore U = - xyz + C where C = constant As at (2, 2, 2), U = 0 so C = 8
OR
Objective question approach : Check that U = 0 at (2, 2, 2)
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