Solve the problem. Round your answer to the nearest tenth.
-A person is pulling a freight cart with a force of 40 pounds. How much work is done in moving the cart 30 feet if the cart's handle makes an angle of 22° with the ground?
A) 1,112.6 ft-lb
B) 45.0 ft-lb
C) 449.5 ft-lb
D) 1,147.6 ft-lb

Question

Quizplus · Accepted Answer

The correct answer is A because the work done is equal to the force applied multiplied by the distance moved in the direction of the force. In this case, the force is 40 pounds, the distance moved is 30 feet, and the angle between the force and the distance is 22 degrees. So, the work done is 40 pounds * 30 feet * cos(22 degrees) = 1,112.6 ft-lb (rounded to the nearest tenth).

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