Explain transformation of kinetic energy into potential energy.?

Energy is the product of power stored in space and time. So potential energy is only born when time is applied to power. What we have is power potential at a particular level of space. When a mass is caused to move it moves with a particular amount of power and the energy used in the motion depends on the time used in the motion. Potential means its there to be used ,kinetic means energy is used as part of the motion.

The conservation of energy. No energy is lost.

I agree with Anonymous - it is courtesy to say thank you and/or to choose a Best Answer. That aside, this should help...

The question says 'explain', so much more is required than just giving (an) example(s).

Some forces have associated energy-storage (potential energy); for example:

- gravitational forces can store potential energy in the gravitational field (gravitational potential energy);

- electric forces can store potential energy in the electric field (electric potential energy);

- spring forces can store potential energy in the metal of the spring (actually the energy associated with the interatomic forces between the atoms of the metal).

When such a force acts on a moving object and the force (or a component of the force) has the *opposite direction* to the moving object, then:

a) the force reduces the object’s speed, hence reduces its kinetic energy;

b) the kinetic energy lost is converted to the potential energy associated with the force;

The work done by the force equals the change in kinetic energy – both are negative. The potential energy gained is minus this this amount, i.e. positive.

For example, you throw a ball (weight 3N) upwards. Say is rises 2m. Work done by gravity (weight) is -2x3 = -6J (negative as force and displacement are in opposite directions). The ball’s change in kinetic energy = -6J (it loses 6J). The increase in gravitational potential energy is -(-6J) = 6J.

I'd be more inclined to answer it you had awarded Best Answers, or written thankyou comments, or even given thumbs ups to the answers you have received for your many other questions.

Since you haven't bothered, I won't bother to answer any more of your questions. I imagine others will feel the same way.

Maybe you could 'catch-up' and start redeeming yourself?

This happens every time you drive and your car slows down going up a hill. You probably respond by pressing on the gas pedal but might realize it is more economical to pickup speed BEFORE the hill because you know ascending will decrease your speed.