Question

A constant force of f = 47i + 30j moves an object along a vector d = 13i - 8j, where units are in pounds and feet. find the work done.

Answer 1

The work is 371 lb ft

Step-by-step explanation:

The work can be calculated with yhe scalar product between the force and the displacement:

`W = F.d`

The scalar product is obtained multiplying component to comoponent and summing the terms:

`W` = <47, 30> · <13, -8> [lb ft]

`W` = 47*13 + 30*(-8) [lb ft]

Finally:

W = 371 [lb ft]