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Physics - Circular Motion Question with Solution | TestHub

PhysicsCircular MotionMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A mass attached to one end of a string crosses topmost point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be ( $g =$ gravitational acceleration)

Options:

Answer:

Solution:

Critical velocity at top most point $v = \sqrt{r g}$

$∴$ Velocity when string become horizontal

$v' = \sqrt{υ^{2} + 2 g r}$

$= \sqrt{3 g r}$

Centripetal acceleration $= \frac{υ^{2}}{r} = \frac{3 r g}{r} = 3 g$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Circular MotionSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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