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प्रश्न
Define 1 joule of energy.
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उत्तर
1 Joule is the amount of work done by a force of 1 Newton on an object that displaces it through a distance of 1 meter in the direction of the applied force.
1 J = 1 N x 1 m.
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संबंधित प्रश्न
Write the expression for work done by a force.
State the S.I. unit of work and define it.
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
In which of the following case the work done by a force will be maximum : when the angle between the direction of force and direction of motion is 0° or 90°?
A boy tries to push a truck parked on the roadside. The truck does not move at all. Another boy pushes a bicycle. The bicycle moves through a certain distance. In which case was the work done more : on the trick or on the bicycle? Give a reason to support your answer.
A boy does work when he pushes against a brick wall. (yes/no).
A 100 W electric lamp emits energy in the form of light at the rate 10 J per second. What percentage of electric energy does the lamp transform into light energy?
If a ball is dropped on the sloping roof of a house, it acquires ______ and falls on the ground. That is the transformation of ______ energy into ______ energy takes place.
(kinetic, potential, motion)
A force can cause an object to change its ______.
What is work?
