ALGEBRA  Proportional
posted by AMY .
The velocity ( v meters per second ) of a body is known to be proportional to the sqaure root of it's kinetic energy ( e ejoules). When the velocity of a body is 120m/s it's kinetic energy is 1600J.
Write down the relationship between v , e using k as the constant of varation.
Calculate the value of k
v = 21 , calculate the kenetic energy of the body in joules.
Can someone explain me please the right method in solving each quesion with the steps.

v= k sqrtKe
120=k sqrt 1600 solve for k, the proportionality constant.
Then,
v= k sqrt KE
ke= (v/k)^2