Question

what is speed of mass is 1 kg and kinetic energy of 1 j

Answer 1

k.e =
$\frac{1}{2} \times m {v}^{2}$
${v }^{2} = 2$
$v = \sqrt{2}$

Answer 2

K.E = 1/2 mv² 
than
 1 J = 1/2 v²
v² = 2 
v= √2 
v= 1.41421 m/s