Question

what is the speed of a 1 kg mass having kinetic energy equal to 1 Joule

Answer 1

ke=1/2×m×v×v
1=1/2×1×v×v
2=v×v
v=
$\sqrt{2}$

Answer 2

KE=1/2mv^2 , kE=1 and m=1 , 1=1/2×1×v^2 , v^2=2 , v=√2