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प्रश्न
For the following scenario, state whether the work done by gravity is positive, negative, or zero.
A person climbs a ladder.
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उत्तर
Negative work is done.
Explanation:
When a person climbs a ladder (upward), the displacement covered by the person is opposite to the direction of the force of gravity (downward), so the work done on the person by the force of gravity is negative.
संबंधित प्रश्न
State the condition when the work done by a force is positive. Explain with the help of examples.
A body is moved in a direction opposite to the direction of force acting on it. State whether the work is done by the force or work is done against the force
The work done by a fielder when he takes a catch in a cricket match, is negative. Explain.
What are the S.I. and C.G.S units of work? How are they related? Establish the relationship.
State and define the S.I. unit of work.
State the factors on which moment of force about a point depends.
What is a centripetal force?
Name the force needed for circular motion. What is the direction of the force?
State the condition when the work done by the force is negative.
