um you can't really get help on this it's mostly you sorry
Answer:
Whenever energy gets transformed, the total
energy remains unchanged. This is the law of
conservation of energy. According to this law,
energy can only be converted from one form
to another; it can neither be created nor
destroyed. The total energy before and after
the transformation remains the same.
Answer:
The same magnitude and sign
Explanation:
The equation for kinetic energy is
Lets assume car's 1 velocity is positive while car's 2 velocity is negative (for example, the first one goes to the right and the second to the left). On both cases when we do the result will be always positive, and since the mass is positive, the kinetic energy is positive. Also, if both cars are identical, they have the same mass, and it is said also that their speed are the same (in magnitude), so this means that their kinetic energies, given by the formula already written, have the same magnitude and sign.