Because of friction...
A. energy is always not conserved
B. not all potential energy is converted into kinetic energy
C. all of an object's kinetic energy turns into potential energy
D. all of an object's potential energy turns into kinetic energy
The answer is B. because the rest of the choices don’t make sense. Also, friction is the force of resisting the relative motion of things, so B. makes the most since. Hope this helps!
