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A body of mass 2 kg slides down a curved track which is quadrant of a circle of radius 1 metre . All the surfaces are frictionless. If the body starts from rest, its speed at the bottom of the track is

1. 4.43 m / sec
2. 2 m / sec
3. 0.5 m / sec
4. 19.6 m / sec

Correct answer: 4.43 m / sec

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