The force f = 2i + 2j - k acting at a = I - 2j + k is displaced to a unit distance on z-axis (Oz = 1) direction. The magnitude of the work done is

The force barF = 2bari+2barj-bark " acting at " bara =bari-2barj+bark is displaced to a unit distance on Z-axis (OZ=1) direction. The magnitude of the work done by it is

If a force of 2 bar i - 5 bar j + bar k (N) acts on a body and displaces it to a distance of 4 bar i - 3 bar j- 2 bar k metres. Calculate the work done.

A particle acted on by constant forces 4i + j - 3k and 3i + j - k is displaced from the point I + 2j + 3k to the point 5i + 4j + k. The total work done by the forces is

Constant force P = 2i - 5j + 6k and Q = -1 + 2j - k act on a particle. When the particle is displaced from A (4, - 3, -2) to B (6,1, - 3) then the work done is

A constant force 3hat i+4hat j-5hat k acts on a particle at hat i+2hat j+2hat k and moves it to a point on the z -axis which is 3 units from origin,the work done is

If a = i + j - 2k, b = -i + 2j + k, c = i - 2j + 2k, then a unit vector parallel to a + b + c =

The vectors 2i - 3j + k, I - 2j + 3k, 3i + j - 2k