Question

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

Answer 1

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.