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A toy is acted upon by a force. State two conditions under which the work done could be zero.

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Question

A toy is acted upon by a force. 

State two conditions under which the work done could be zero.

Very Short Answer
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Solution

The work done could be zero under these two conditions:

  1. When there is no displacement of the toy, even though a force acts on it.
  2. When the force is perpendicular to the displacement, i.e. the angle between force and displacement is 90°.
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Chapter 1: Force, Work, Energy and Power - Frequently Asked Questions in Board Examination [Page 78]

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Frank Physics Part 2 [English] Class 10 ICSE
Chapter 1 Force, Work, Energy and Power
Frequently Asked Questions in Board Examination | Q 8. (a) | Page 78
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