Quiz - physics - Circular Motion-PYQ

Q1. A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be (g = 10 m/s²) Source: orcusprep.in

NEET 2019

medium

10 π rad/s

10 rad/s

\( \frac{10}{\sqrt{2\pi}} \) rad/s

10 rad/s

Q2. One end of 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 circle with speed v, the net force on the particle (directed towards centre) will be (T represents the tension in the string) Source: orcusprep.in

NEET 2017

easy

\( T + \frac{mv^2}{l} \)

\( T - \frac{mv^2}{l} \)

zero

T

Q3. A car is negotiating a curved road of radius R. The road is banked at an angle θ. The coefficient of friction between the tyres of the car and the road is μs. The maximum safe velocity on this road is Source: orcusprep.in

NEET-I 2016

hard

\( \sqrt{\frac{gR(\mu_s+\tan\theta)}{1-\mu_s\tan\theta}} \)

\( \sqrt{gR \frac{2+\mu_s \tan\theta}{1-\mu_s \tan\theta}} \)

\( \frac{mv^2}{R} = mg \frac{\mu_s + \tan\theta}{1-\mu_s\tan\theta} \)

\( \sqrt{gR \frac{\mu_s + \tan\theta}{1-\mu_s\tan\theta}} \)

Q4. Two stones of masses m and 2m are whirled in horizontal circles, the heavier one in a radius r/2 and the lighter one in radius r. The tangential speed of lighter stone is n times that of the value of heavier stone when they experience same centripetal forces. The value of n is Source: orcusprep.in

NEET 2015

medium

4

1

2

3

Q5. A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/s. A bob is suspended from the roof of the car by a light wire of length 1.0 m. The angle made by the wire with the vertical is Source: orcusprep.in

NEET 2013 Karnataka

medium

π/3

π/6

π/4

0°

Q6. A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45°, the speed of the car is Source: orcusprep.in

NEET 2012

easy

20 m s²

30 m s²

5 m s²

10 m s²

Q7. A car of mass m is moving on a level circular track of radius R. If μs represents the static friction between the road and tyres of the car, the maximum speed of the car in circular motion is given by Source: orcusprep.in

NEET Mains 2012

easy

μsmRg

Rg/μs

mRg/μs

μsRg

Q8. A gramophone record is revolving with an angular velocity ω. A coin is placed at a distance r from the centre of the record. The static coefficient of friction is μ. The coin will revolve with the record if Source: orcusprep.in

NEET 2010

easy

r = mgω²

r < g/(ω²μ)

r ≤ μg/ω²

r ≥ μg/ω²

Q9. A roller coaster is designed such that riders experience “weightlessness” as they go round the top of a hill whose radius of curvature is 20 m. The speed of the car at the top of the hill is between Source: orcusprep.in

NEET 2008

medium

16 m/s and 17 m/s

13 m/s and 14 m/s

14 m/s and 15 m/s

15 m/s and 16 m/s

Q10. A tube of length L is filled completely with an incompressible liquid of mass M and closed at both the ends. The tube is then rotated in a horizontal plane about one of its ends with a uniform angular velocity ω. The force exerted by the liquid at the other end is Source: orcusprep.in

NEET 2006

hard

\( \frac{ML^2\omega^2}{2} \)

\( \frac{ML\omega^2}{2} \)

\( ML\omega^2 \)

\( ML^2\omega^2 \)

Q11. A 500 kg car takes a round turn of radius 50 m with a velocity of 36 km/hr. The centripetal force is Source: orcusprep.in

NEET 1999

easy

1000 N

750 N

250 N

1200 N

Q12. A ball of mass 0.25 kg attached to the end of a string of length 1.96 m is moving in a horizontal circle. The string will break if the tension is more than 25 N. What is the maximum speed with which the ball can be moved ? Source: orcusprep.in

NEET 1998

easy

5 m/s

3 m/s

14 m/s

3.92 m/s.

Q13. When milk is churned, cream gets separated due to Source: orcusprep.in

NEET 1991

easy

centripetal force

centrifugal force

fricitional force

gravitational force

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Physics - Circular Motion-PYQ

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Physics - Circular Motion-PYQ

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