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

(1) 250 N

(2) 750 N

(3) 1000 N

(4) 1200 N

Subtopic:  Uniform Circular Motion |
 85%
From NCERT
PMT - 1999
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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 

(1) 14 m/s

(2) 3 m/s

(3) 3.92 m/s

(4) 5 m/s

Subtopic:  Uniform Circular Motion |
 77%
From NCERT
PMT - 1998
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A body of mass 5 kg is moving in a circle of radius 1m with an angular velocity of 2 radian/sec. The centripetal force is 

(1) 10 N

(2) 20 N

(3) 30 N

(4) 40 N

Subtopic:  Uniform Circular Motion |
 87%
From NCERT
AIIMS - 1998
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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-

(1) 20 ms–1

(2) 16 ms–1

(3) 14 ms–1

(4) 12 ms–1

Subtopic:  Uniform Circular Motion |
 85%
From NCERT
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Find the maximum velocity for skidding for a car moved on a circular track of radius 100 m. The coefficient of friction between the road and tyre is 0.2 

(1) 0.14 m/s

(2) 140 m/s

(3) 1.4 km/s

(4) 14 m/s

Subtopic:  Uniform Circular Motion |
 77%
From NCERT
PMT - 1996
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A ball of mass \(0.1~\text{kg}\) is whirled in a horizontal circle of radius \(1\) m by means of a string at an initial speed of \(10~\text{rpm}\) . Keeping the radius constant, the tension in the string is reduced to one quarter of its initial value. The new speed is:

1. \(5~\text{rpm}\) 2. \(10~\text{rpm}\)
3. \(20~\text{rpm}\) 4. \(14~\text{rpm}\)
Subtopic:  Uniform Circular Motion |
 71%
From NCERT
PMT - 2001
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A cyclist riding the bicycle at a speed of 143ms–1 takes a turn around a circular road of radius 203m without skidding. Given g = 9.8 ms–2, what is his inclination to the vertical?

(1) 30o

(2) 90o

(3) 45o

(4) 60o

Subtopic:  Uniform Circular Motion |
 71%
From NCERT
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A point mass \(m\) is suspended from a light thread of length \(l,\) fixed at \(O\), and is whirled in a horizontal circle at a constant speed as shown. From your point of view, stationary with respect to the mass, the forces on the mass are:

 

1. 2.
3. 4.
Subtopic:  Uniform Circular Motion |
 56%
From NCERT
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If a cyclist moving with a speed of 4.9 m/s on a level road can take a sharp circular turn of radius 4 m, then coefficient of friction between the cycle tyres and road is 

(1) 0.41

(2) 0.51

(3) 0.61

(4) 0.71

Subtopic:  Uniform Circular Motion |
 81%
From NCERT
AIIMS - 1999
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A motor cycle driver doubles its velocity when he is having a turn. The force exerted outwardly will be

(1) Double

(2) Half

(3) 4 times

(4) 14 times

Subtopic:  Uniform Circular Motion |
 84%
From NCERT
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