Awoman exerts a horizontal force of 10 pounds on a box as she pushes it up a ramp that is 4 feet long and inclined at an angle of 30 degrees above the horizontal.

find the work done on the box.

W = 51.9 ft-lbs

Explanation:

given,

Force, F = 10 Pounds

angle with horizontal, θ = 30°

distance, R = 4 ft

we know,

Work done is equal to force into displacement.

displacement,s = 6 cos θ

                       = 6 cos 30° = 5.19 ft

work done = F.s      

W = F . s

W = 5.19 x 10

W = 51.9 ft-lbs

the work done on the box is equal to 51.9 ft-lbs.

hi there if you are asking for conformation that wavelingth is the correct answer is wrong it is the answer is frequency. : )

i hope this you out, have a wonderful day

i don't know that i agree with that but what's the question ?