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Horizontal, What is the Work Done on the Object by the Gravitational Force? Explain Your Answer. - CBSE Class 9 - Science

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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.

Solution

Work done by gravity depends only on the vertical displacement of the body. It does not depend upon the path of the body. Therefore, work done by gravity is given by the expression,

W = mgh

Where,

Vertical displacement, = 0

W = mg × 0 = 0

Hence, the work done by gravity on the body is zero.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Science Textbook for Class 9 (2018 to Current)
Chapter 11: Work and Energy
Q: 5 | Page no. 158
Solution Horizontal, What is the Work Done on the Object by the Gravitational Force? Explain Your Answer. Concept: Work and Energy - Potential Energy of an Object at a Height.
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