Aforce f of strength 20 n acts on an object of mass 3 kg as it moves a distance of 4 m. if f is perpendicular to the 4 m displacement, the work it does is equal to how many joules?

Data:



Work is calculated from the following formula:

Where a is the angle between force vector and displacement vector. When force is perpendicular to displacement, a = 90 deg and cosine of this angle = 0.
Therefore, the work this force does = 0 [J]