Question

What is the speed of a 1 kg mass if it has a kinetic energy of 1 J?

Answer 1

Answer:

Explanation:

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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Answer 2

1.41 m/s.

kinetic energy = 1/2 mv²

substitute m=1 kg

kinetic energy = 1J

1= 1/2 ×1× v²

v=√2 = 1.41 m/s