A body of mass 0.4 kg is whirled in a vertical circle making 2 rev/sec

1.	A body of mass 0.4 kg is whirled in a vertical circle making 2 rev/sec . If the radius of the circle is 2 m , then tension in the string when the body is at the top of the circle, isA. `41.56 N`B. `89.86 N`C. `109.86 N`D. `122.2 N`
Answer» Correct Answer - D T=mw²r-mg for 2 rev/sec we need to find w(omega) i.e. angular velocity

A body of mass 0.4 kg is whirled in a vertical circle making 2 rev/sec . If the radius of the circle is 2 m , then tension in the string when the body is at the top of the circle, isA. `41.56 N`B. `89.86 N`C. `109.86 N`D. `122.2 N`

Answer» Correct Answer - D

T=mw²r-mg

for 2 rev/sec we need to find w(omega) i.e. angular velocity

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A body of mass 0.4 kg is whirled in a vertical circle making 2 rev/sec . If the radius of the circle is 2 m , then tension in the string when the body is at the top of the circle, isA. `41.56 N`B. `89.86 N`C. `109.86 N`D. `122.2 N`

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