00:01
We're given that the kinetic energy of a moving object varies jointly with its mass and the square of the velocity.
00:08
We're given the mass, velocity, and kinetic energy so that we can find our constant proportionality.
00:14
Then using the equation that we get, we need to find the kinetic energy with the same mass of 25 kilograms with a new velocity.
00:24
So we have varies jointly.
00:26
So we have kinetic energy is equal to our constant variation, which is lower case.
00:32
Case k times our mass and velocity squared.
00:38
So using the information that we're given, we're given 1 ,250 joules is equal to our constant proportionality, which we don't know, times 25 times 10 squared.
00:50
We divide both sides by 25 times 10 squared...