A body of negligible mass tied to the end of a string is rotated in a vertical circle of radius $80 c m$ . At a horizontal point on the circle,what is the speed of the body? (in m/s)

4.85

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6.36

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6.37

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9.36

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Solution

The correct option is A $4.85$
$v = \sqrt{3 r g}$
$v = \sqrt{3 * 0.8 * 9.8} = 4.85 N$

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A body of negligible mass tied to the end of a string is rotated in a vertical circle of radius 80cm. At a horizontal point on the circle,what is the speed of the body? (in m/s)

The correct option is A 4.85v=√3rgv=√3∗0.8∗9.8=4.85N

A body of negligible mass tied to the end of a string is rotated in a vertical circle of radius $80 c m$ . At a horizontal point on the circle,what is the speed of the body? (in m/s)

The correct option is A $4.85$
$v = \sqrt{3 r g}$
$v = \sqrt{3 * 0.8 * 9.8} = 4.85 N$