1.

If forces of magnitude 6 and 7 units acting in the direction bari-2barj +2bark and 2bari -3barj -6bark respectively act on particle which is displaced from P (2,-1,-3) to Q(5,-1,1) then the work done by the forces is

Answer»

4 UNITS
`-4 units`
7 units
`-7 units

Answer :A


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