A car traveling at 60 mph has how much more energy than a car going at 20 mph?

1 Answer

9 times the Kinetic Energy

Explanation:

Kinetic energy (KE) = 0.5mv^2

..where m = mass, and v = velocity.

So at 20 mph, KE = 0.5m(20)^2 = 200m

And at 60 mph, KE = 0.5m(60)^2 = 1800m

Note that m = mass, and not meters!

So (1800m)/(200m) = 9 times the Kinetic Energy.