Question

. A force F = (3î +4 +5k) N acts on an object and displaces it through d = 5k m. The total work done by the force in this process is [NCERT Pg. 117] (2) 60 J (1) 25 J (3) 15 J (4) 20 J ​

Answer 1

Answer:

Work done = F.S (Dot product)

[ A.B = ax bx + ay by + az bz ]

So, Work done

= 3×0 + 4×0 + 5×5

= 25J