Because of friction? A. energy is not always conserved B. not all potential energy is converted to kinetic energy
C. all an object's kinetic energy turns into potential energy
D all of an object's potential energy turns into kinetic energy

i think its B.NOT all potential energy is converted to kinetic energy

Maybe,  B. Not all potential energy is converted to kinetic energy.

Explanation:

Even if air resistance slows down the ball, the potential energy is the same. But if air resistance is in the way, not all of the potential energy can be converted to kinetic energy. Some of the energy has to be used to push the air molecules out of the way.

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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it will be pushed away from the source of the electric field. a negative charge in a cloud induces a positive charge in the ground below the cloud.

explanation: