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Calculate the work performed (physics question)

QUESTION: Determine the amount of work that would be performed by a constant horizontal 25 Newton force if that force pushed a 75 kilogram rock 15 meters across a horizontal surface.

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ANSWER: The amount of work that would be performed by a 25 Newton force that pushed a 75 kilogram rock or any other object 15 meters would be 375J. This is because the work performed by a constant horizontal force is equal to the force in Newtons multiplied by the distance that the object was pushed in meters. In other words, for this particular situation, the amount of Work in joules = the amount of Force in Newtons multiplied by the Distance traveled in meters or W = F * d. As a result, the correct answer to the problem is 25 Newtons * 15 meters or 375 joules. It is important to note that the weight of the object actually has no bearing on the amount of work performed by the force and that this formula only works for a constant horizontal force and not for a force pushing an object at an angle.

Source of question: http://www.mcatprepinfo.com/phys-sci-questions-1.htm
Source of answer: http://www.mcatprepinfo.com/phys-sci-answers-1.htm

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