An object falling to the groung has decreasing kinetic energy and increasing potential energy. Do you agree? Why or why not?
Conservation of energy | Work and energy | Physics | Khan Academy
Using the law of conservation of energy to see how potential energy is converted into kinetic energy. Created by Sal Khan. Watch the next lesson: ...
Answer
An object falling to the groung has decreasing kinetic energy and increasing potential energy. Do you agree? Why or why not?
No I do not agree:
There are two parts in this case, potential energy and kinetic energy. The object starts out with no kinetic energy and potential energy of PE = mgh where m is the mass, g is acceleration due to gravity and h is its initial height above the ground. The kinetic energy is zero. As the object falls it loses potential energy and gains kinetic energy KE = mv2/2. The sum PE and KE remain constant. When the object reaches the ground its final KE will be equal to its original PE.
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