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Is In the Following following exemple determine the direction of force and of displacement. Identify positive, negative or zero work done by applying the force |
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Answer» E WORK: The work done on an object is said to be positive work when FORCE and DISPLACEMENT are in same direction.Example: When an object MOVES on horizontal surface, force and displacement acts in same direction. So, work done is positive.NEGATIVE WORK: The work done is said to be negative work when force and displacement are in opposite direction.Example: When an object is thrown upwards,the force of gravity is in DOWNWARD direction whereas displacement acts in upward direction. ZERO WORK: The work done is said to be zero when force and displacement are perpendicular to each other or when either force or displacement is zero.Example: When we hold an object and walk, the force acts in downward direction whereas displacement acts in forward direction. |
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