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A mass of 10 kg is at a point A on a table. It is moved to a p... - Science
Question
A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
Answer
The work done by the gravitational force is zero.
Explanation:
The gravitational force acts vertically downwards. The displacement of the object (from A to B) is horizontal. Since the force and displacement are perpendicular (90^\circ) to each other, the work done is zero.
