Question

Work done by any force will be maximum if the object moves along the direction of
the applied force.
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Answer 1

Work done on an object along a given direction of motion is equal to the force times the displacement times the cosine of the angle. No work is done along a direction of motion if the force is perpendicular.

Answer 2

The work W done on an object by a constant force is defined as W = F·d. It is equal to the magnitude of the force, multiplied by the distance the object moves in the direction of the force. In the example above F = mg = (20 kg)(9.8 m/s2) = 196 N, W = (196 N)(1.5 m) = 294 Nm. Work is a scalar, a number with units