Question

when u will say that energy of an object is one joule?
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Answer 1

Answer:

In mechanics, 1 joule is the energy transferred when a force of 1 Newton is applied to an object and moves it through a distance of 1 meter. Another unit of energy you may have come across is the Calorie.

Answer 2

Answer:

When a force of one Newton displaces a body through 1m in its own direction

Explanation:

Joule is the SI unit of Work (Work and energy are related by the Work-Energy theorem, so they are almost the same)

Work done (W) = F x s x cos Θ

Where 'F' stands for magnitude of Force and 's' stands for magnitude of displacment. 'Θ' stands for the angle between the Force vector and the displacement vector.

This can also be written as the dot product (scalar product) of the Force and Displacement Vector.

1J of energy will do 1J of work

Therefore,

From the above equation,

1J = 1N x 1m

Thus, when a force of 1N applied on a body causes a displacement of 1m in the same direction as the force, we will say the energy of the body is 1J.