Question

If the forces(2i^+2k^)N on acting on the object displaces it (2j^+2k^)then the work done on object is? ​

Answer 1

Answer:

work done is the dot product of force and dispacement

F.S = 4 J

Answer 2

Answer:

4 J

Explanation:

We need to use dot product.

(2i + 2k) . (2j + 2k) = 2*2(i.j) + 2*2(i.k) + 2*2(j.k) + 2*2(k.k)

(2i + 2k) . (2j + 2k) = 0 + 0 + 0 + 4

= 4J