Posted by britches on .
6. You have kinetic energy when you run. If you run three times as fast, you'll have a kinetic energy ____________________.
A) 3 times as much.
B) 6 times as much.
C) 9 times as much.
D) that is the same.
E) None of these.

physics 
Steve,
replace v with 3v
KE = 1/2*m(3v)^2 = 1/2 * m * 9v^2
KE is multiplied by 9.