Medal for help!
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.

a. 851 foot-pounds
b. 371 foot-pounds
c. -851 foot-pounds
d. 851.1 foot-pounds

Question

Medal for help!
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.


a. 851 foot-pounds
b. 371 foot-pounds
c. -851 foot-pounds
d. 851.1 foot-pounds

michele_laino · Answer

we have to compute the scalar product between force and distance

michele_laino · Answer

hint:
$$\Large  W = 47 \times 13 + 30 \times \left( { - 8} \right) = ...?$$

michele_laino · Answer

where W indicates the work done by your force

anonymous · Answer

Ah I see so W = 371