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A sled is pulled along a level path through snow by a rope. A 20-lb force acting at an angle of 40° above the horizontal moves the sled 90 ft. Find the work done by the force. (Round your answer to the nearest whole number.)

Respuesta :

Answer:

Work one by the force, W = 1378.87 lb-ft

Explanation:

It is given that,

Force acting on the sled, F = 20 lb

Angle between the force and the horizontal, θ = 40°

Distance moved, d = 90 ft

We need to find the work done by the force. We know that the work done can be calculated as :

[tex]W=Fd\ cos\theta[/tex]

[tex]W=20\ lb\times 90\ ft\ cos(40)[/tex]

W = 1378.87 lb-ft

So, the work done by the force is 1378.87 lb-ft. Hence, this is the required solution.