Question

3. At what speed a body of mass 1 kg will have a kinetic energy of 1 J?​

Answer 1

Answer:

We know that KE =

$1 \div 2 \: mv ^{2}$

1

$1 = 1 \div 2 \: (1) {v}^{2}$

${v}^{2} \div 2 = 1$

${v}^{2} = 2$

$v = \sqrt{2}$

Hence the speed is √2 m/s