⚫◾Energy of a body is it's capacity to do work .
There are two basic forms of energy.
⚫Kinetic energy
⚫Potential energy
⚫kinetic energy
◾ Kinetic is the energy possessed by a body due to its motion
⚫Potential energy
◾ Potential energy is the energy possessed by a body due to its changed position.
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Kinetic energy:
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⚫◾ Let us derive a formula for kinetic energy of a moving body .
Consider a car running with constant speed on a road .if it's engine is switched off , it will still cover some distance before stopping.As long as it is moving , it is doing work against the force of friction of the road .in other words during this travel , it will exert a force equal to the magnitude to the force of friction f .
Let the distance travelled before coming to rest be d,
Then work done by the car would be fd .
This work is done by car due to its motion ..
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