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JEE Main20209 Jan 2020Morning ShiftPhysicsRotational MotionActual

One end of a straight uniform 1 m long bar is pivoted on horizontal table. It is released from rest when it makes an angle 30 o from the horizontal (see figure). Its angular speed when it hits the table is given as n   r a d   s - 1 , where n is an integer. The value of n is ____________

Correct answer

0

Step-by-step solution

according to energy conservation m g l 2 sin ⁡ 30 ° = 1 2 m l 2 3 ω 2 Solving ω 2 = 15 ω = 15

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