Explanation :
Given that,
Force, F = 20 N
The force is applied at an angle of 45 degrees to move a box a horizontal distance of 40 meters. We have to find the work done by the force. It is given by :
W = F. d
[tex]W=Fd\ cos\theta[/tex]
[tex]W=20\ N\times 40/ m cos(45)[/tex]
W = 565.6 Joules
or
[tex]W=5.6\times 10^2\ Joules[/tex]
Hence, this is the required solution.
