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Define work and types of work …

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Define work and types of work with example

    • Posted by Omprakash Omprakash 6 years, 4 months ago

    CBSE > Class 11 > Physics
    • 1 answers

    Sia ? 6 years, 4 months ago

    1. When the direction of applied force is in the direction of displacement then work done is said to be positive. e.g. When a body falls under the action of gravity, {tex}\theta = 0 ^ { \circ }{/tex} 
    2. When the direction of applied force is opposite to the direction of displacement then work done is said to be negative. e.g. When brakes are applied on a moving vehicle work done by a braking force is negative.
    3. When the direction of applied force is perpendicular to the direction of displacement then work done is zero. e.g. A coolie carrying a load on his head moves on a horizontal platform, {tex}\theta = 90 ^ { \circ }{/tex} work done is zero.

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