Physics Crash Course MHT-CET>Chapter 3 - Circular Motion>Exercise 1>Q 75

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When a car is going around a circular track (with uniform speed), the resultant of all the forces on the car in an inertial frame is,

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Important Questions on Circular Motion

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Physics Crash Course MHT-CET>Chapter 3 - Circular Motion>Exercise 1>Q 76

A

10 kg

object attached to a nylon cord outside a space vehicle is rotating at a speed of

5 m s^{- 1}

. If the force acting on the cord is

125 N

, its radius of path is,

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Physics Crash Course MHT-CET>Chapter 3 - Circular Motion>Exercise 1>Q 77

The breaking tension of a string is

50 N

. A body of mass

1 kg

is tied to one end of a

1 m

long string and whirled in a horizontal circle. The maximum speed of the body should be,

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Physics Crash Course MHT-CET>Chapter 3 - Circular Motion>Exercise 1>Q 78

A proton of mass

1.6 \times 10^{- 27} kg

goes round in a circular orbit of radius

0.12 m

under a centripetal force of

6 \times 10^{- 14} N

. Then, the frequency of revolution of the proton is about,

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Physics Crash Course MHT-CET>Chapter 3 - Circular Motion>Exercise 1>Q 79

A particle does uniform circular motion in a horizontal plane. The radius of the circle is

20 cm

. If the centripetal force

F

is kept constant but the angular velocity is doubled, the new radius of the path (original radius,

R

) will be,

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Physics Crash Course MHT-CET>Chapter 3 - Circular Motion>Exercise 1>Q 80

Fats can be separated from milk in a cream separator because of,

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Physics Crash Course MHT-CET>Chapter 3 - Circular Motion>Exercise 1>Q 81

If

p

is the magnitude of linear momentum of a particle executing a uniform circular motion, then the ratio of centripetal force acting on the particle to its linear momentum is given by,

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Physics Crash Course MHT-CET>Chapter 3 - Circular Motion>Exercise 1>Q 82

A racing car of mass

10^{2} kg

goes around a circular track (horizontal) of radius

10 m

. The maximum thrust that track can withstand is

10^{5} N

. The maximum speed with which the car can go around is,

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Physics Crash Course MHT-CET>Chapter 3 - Circular Motion>Exercise 1>Q 83

Two particles of equal masses are revolving in circular paths of radii

r_{1}

and

r_{2}

, respectively, with the same speed. The ratio of their centripetal forces is,