NEET Physics Work-Energy Theorem MCQ Question
A block of mass 2 kg is pushed up a frictionless incline with an angle of 30° for a distance of 5 meters by a force of 20 N parallel to the incline. What is the work done by the gravitational force on the block?
-50 J
0 J
-100 J
50 J
Correct Answer
Detailed Explanation
The work done by the gravitational force is negative as it acts opposite to the displacement. Using the work-energy theorem, W = mgh = 2 * 10 * 5 * sin(30°) = -50 J.
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