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A coin is placed on a gramophone record rotating at a speed of 45 r.p.m. It flies away when the rotational speed is 50 r.p.m. If two such coins are placed one over the other on the same record, both of them will fly away when rotational speed is

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Important Questions on Dynamics of Uniform Circular Motion

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11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 8 - Dynamics of Uniform Circular Motion>EXERCISE>Q 18
A motorcycle is going on an overbridge of radius R. The driver maintains a constant speed. As the motorcycle is ascending on the overbridge, the normal force on it
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11th West Bengal Board
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A Text Book of PHYSICS PART I : CLASS 11>Chapter 8 - Dynamics of Uniform Circular Motion>EXERCISE>Q 19
A car crosses three bridges one after another with the same speed. The first bridge is a plane bridge, the second one is convex upward and the third one is concave upward. F1, F2 and F3 are respectively the normal forces exerted by the car on the bridges when it passes through the middle of the bridges. Which of the following statements is correct?
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11th West Bengal Board
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A Text Book of PHYSICS PART I : CLASS 11>Chapter 8 - Dynamics of Uniform Circular Motion>EXERCISE>Q 20
A particle moves along a curved path. Which of the following quantities may remain constant during the motion?
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11th West Bengal Board
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A Text Book of PHYSICS PART I : CLASS 11>Chapter 8 - Dynamics of Uniform Circular Motion>EXERCISE>Q 21
A car is moving in a circular horizontal track of radius 10 m with constant speed of 10 m/s. A plumb bob is suspended from the roof of the car by a light rigid rod. The angle made by the rod with the vertical is g=10 m/s2
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11th West Bengal Board
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A Text Book of PHYSICS PART I : CLASS 11>Chapter 8 - Dynamics of Uniform Circular Motion>EXERCISE>Q 22
A stone is swinging in a horizontal circle 0.8 m in diameter at 30 rev min-1. A distant light causes a shadow of the stone to be formed on a near by wall. What is the amplitude of the motion of the shadow? What is the frequency?
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11th West Bengal Board
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A Text Book of PHYSICS PART I : CLASS 11>Chapter 8 - Dynamics of Uniform Circular Motion>EXERCISE>Q 23
Given that centripetal force F=-kr2. The total energy is
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11th West Bengal Board
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A Text Book of PHYSICS PART I : CLASS 11>Chapter 8 - Dynamics of Uniform Circular Motion>EXERCISE>Q 24
A particle of mass m is tied to one end of a string of length l and rotated though the other end along a horizontal circular path with speed v. The work done in full horizontal circle is
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11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 8 - Dynamics of Uniform Circular Motion>EXERCISE>Q 25
A particle is moving in a circle of radius R is such a way that at any instant the normal and tangential components of its acceleration are equal. If its speed at t=0 is v0, the time taken to complete the first revolution is