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Work done by a force at angle

An object of mass = 2 kg is pulled by a constant force F = 4 N for a horizontal distance of 2 m. (the rope pulling the mass is at an angle of 30 degrees above the horizontal) What is the work done along the positive x axis? Neglect friction.

8 kg m/s^2
8 kg m^2/s^2
7 kg m/s^2
7 kg m^2/s^2

Solution Preview

To calculate the work done on an object by a force during a displacement, we use only the force component along the object's displacement. The force component perpendicular to the displacement does zero work.

Here given the rope pulling the mass is ...

Solution Summary

MS Word document contains detailed step-by-step information, one diagram and detailed explanation of units.