A man of mass 90kg is moving at a constant velocity.He has kinetic energy of 2205j.Calculate his velocity
(1/2) m v^2 = Kinetic energy = 2205 J
(1/2) (90) v^2 = 2205
v^2 = 2205/45
v = 7 m/s
by the way that is SPEED (scalar) NOT velocity which is a vector containing both speed and direction.
for example
1 m/s is speed
1 m/s North East is velocity