If you guys don't mind, I had one more question that I'm probably overthinking as well. The answer to this question is D and I plugged in my own numbers to get that answer. However, I don't understand the concept. Why is it that dividing the velocity by two means you have to divide the Kinetic Energy by 4? I bolded "divide" because that's what "decrease by a factor" means to do.
The kinetic energy E of an object is given by E = .5*m*v^2
where m is the object's mass and v is the velocity of the
object. If the velocity of an object decreases by a factor
of 2 what will happen its kinetic energy?
A. Kinetic energy will increase by a factor of 2.
B. Kinetic energy will increase by a factor of 4.
C. Kinetic energy will decrease by a factor of 2.
D. Kinetic energy will decrease by a factor of 4.
