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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

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Important Questions on Circular Motion

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Beta Question Bank for Medical: Physics>Chapter 7 - Circular Motion>Exercise (Previous Year Questions)>Q 4

A car of mass

1000 kg

negotiates a banked curve of radius

90 m

on a frictionless road. If banking angle is

45 °

, the maximum speed of car is

[g = 10 m s^{- 2}] :

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Beta Question Bank for Medical: Physics>Chapter 7 - Circular Motion>Exercise (Previous Year Questions)>Q 5

A car of mass

m

is moving on a level circular track of radius

R

. If

μ_{s}

represents the static friction between the road and tyres of the car, the maximum speed of the car in circular motion is given by

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Beta Question Bank for Medical: Physics>Chapter 7 - Circular Motion>Exercise (Previous Year Questions)>Q 6

Two stones of masses

m

and

2 m

are whirled in horizontal circles, the heavier one in a radius

\frac{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 the same centripetal force. The value of

n

is,

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Beta Question Bank for Medical: Physics>Chapter 7 - Circular Motion>Exercise (Previous Year Questions)>Q 7

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

μ_{s}

. The maximum safe velocity on this road is

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Beta Question Bank for Medical: Physics>Chapter 7 - Circular Motion>Exercise (Previous Year Questions)>Q 8

In the given figure, $a = 15 m s^{- 2}$ represents the total acceleration of a particle moving in the clockwise direction in a circle of radius $R = 2.5 m$ at a given instant of time. The speed of the particle is

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Beta Question Bank for Medical: Physics>Chapter 7 - Circular Motion>Exercise (Previous Year Questions)>Q 9

A particle starts with angular acceleration

2 rad s^{- 2}

. It moves

100 rad

in a random interval of

5 \sec

. Find out the time at which random interval starts.

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Beta Question Bank for Medical: Physics>Chapter 7 - Circular Motion>Exercise (Previous Year Questions)>Q 10

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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Beta Question Bank for Medical: Physics>Chapter 7 - Circular Motion>Exercise (Analytical Questions)>Q 1

A wheel has a constant angular, acceleration of

3.0 rad s^{- 2}

. During a certain

4.0 s

interval, it turns through an angle of

120 rad

. Assuming that at

t = 0

, angular speed

ω_{0} = 3 rad s^{- 1}

how long, is motion at the start of this

4.0 s

interval?

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

Important Questions on Circular Motion

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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