Question

calculate the dot product of forces and displacement if a force of 10N displace the body through 4meters in the direction of force​

Answer 1

Answer:

40Nm

Explanation:

If i, j and k are unit vectors along x, y and z-axis respectively then,

i · i = j · j = k · k = 1

i · j = i · k = j · k = 0

Given that both force and displacement are in the same direction.

If i is the unit vector along their direction then,

Their dot product = (10N i) · (4m j) = 40 Nm