00:01
Hello everyone.
00:01
In this problem, we're asked to find by what factor does a cheetah's kinetic energy exceed that of a sprinting man.
00:09
Okay, so we're told that the cheetah has a mass of 60 kilograms and so does the runner.
00:15
So we have that both of these are equal to each other.
00:18
And we're told that the speed of the cheetah at sprinting is 33 meters per seconds, whereas the runner's speed is 11 meters per seconds, which means that the cheetah's speed is equal to three times that of the runners.
00:34
And so we're as to find the relationship between the kinetic energies of the two.
00:39
So we're asked to find by what factor is the kinetic energy of the cheetah bigger than the kinetic energy of the runner.
00:48
Okay, so the kinetic energy, as always, is given by half times the mass of the object times the velocity of the object squared...