A ball weighing \[\frac{1}{2}\] kg has a kinetic energy 1 joule when i

1.	A ball weighing \[\frac{1}{2}\] kg has a kinetic energy 1 joule when its speed is:
A.	1 m/s
B.	2 m/s
C.	3 m/s
D.	4 m/s
Answer» C. 3 m/s

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A ball weighing \[\frac{1}{2}\] kg has a kinetic energy 1 joule when its speed is:

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