1.

1 kg mass has a kinetic energy of 1 joule when its velocity is

Answer»

K.E = 1/2 m v2

We'll REPLACE K.E i.e kinectic enerygy by 1 J and MASS (m) by 1 (given in the QUESTION)

1 = 1/2 * 1 * v2

2 = v2 (take 2 to the other SIDE)

root 2 = v

or 1.4 m/s = v


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