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Accelerate NEET 2020: Circular Motion Class 4 (26.11.2019)

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Question 1

A stone of mass of 16 kg is attached to a string 144 m long and is whirled in a horizontal circle. The maximum tension the string can withstand is 16 Newton. The maximum velocity of revolution that can be given to the stone without breaking it, will be

Question 2

A 80 gm stone is attached to the one end of the string and rotated in a vertical circle of radius 10 cm with velocity 10 m/s. When it is rotated in a circular path then find the maximum tension in the string. Assume the value of gravity is g = 10 m/s²

Question 3

Direction: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as:

Assertion: The centripetal forces and centrifugal forces never cancel out.
Reason: They do not act at the same time.

Question 4

A small mass m is tied to a string of length L making an angle Ɵ with the vertical. The particle is whirled in a horizontal circle. Find the ratio of time periods of this conical pendulum to the normal pendulum having same mass and string.

Question 5

One end of the string of length ‘l’ is connected to a particle of mass ‘m’ and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in a circle with speed 'v' the net force on the particle (directed towards the centre) will be (T represents the tension in the string):-

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Nov 26NEET & AIIMS