Q6 of 55 Page 362

A 1 kg mass has a kinetic energy of 1 joule when its speed is:

Given,

Mass of body m= 1 kg


Kinetic energy = 1 J


Velocity v=?


Kinetic energy = m v2


Substituting the given values in the equation:


1 J = ×1× v2


1×2 = v2


v2 = 2


v=


v= 1.4 ms-1

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