# Math Help - kinetic energy

1. ## kinetic energy

kinetic energy is linearly proportional to speed.

a) true
b) false

2. Originally Posted by babygirl
kinetic energy is linearly proportional to speed.

a) true
b) false
False, because,
$e=\frac{1}{2}mv^2$
If they are linearly proportional you are impliying,
$\frac{\frac{1}{2}mv^2}{v}=\frac{1}{2}mv=\mbox{ konstant}$
Therefore, it is right to say,
"kinetic energy is directly proportional to the square of speed"