Question

A one kg mass has a kinetic energy of one joule when its speed is

Answer 1

K.E=1/2×m×v^2
1=1/2×1×v^2
v^2=2
$v = \sqrt{2}$

Answer 2

Answer:

● When it's speed is 1.4m/s

=> $K.E = 1/2 m {v}^2$

=> $1 = 1/2 × 1 × {v}^2$

=> $2 = {v}^2$

=> ${v}^2 = 2$

=> $v = √2$

or

=> $1.4m/s$