Question

a body is displaced from (0,1,2) to (2,2,1) under the action of force f (i+ 2j-k)N find the work done by the force​

Answer 1

Answer:

5N

Explanation:

W=F. S

Work is the scalar function of force and distance.

Here two coordinates are given. As we know i, j, z are the scalar functions of x, y, z axes. There fore, here the work done is calculated by doing scalar operation.

F(0,1,2) = 0 + (2×1) - 2 = 0+2-2 =0//

F(2,2,1) = 2 + (2×2) -1 = 2+ 4-1 = 6-1 =5//

Therefore the work done is 5N.