IIT JEE Questions And Answers :: Circular Motion Centre Of Mass: part1



IIT JEE : Circular Motion Centre Of Mass QUESTIONS AND ANSWERS :: part1 : 11 to 15

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

11.A stone of mass 0.3 kg attached to a 1.5 m long string is whirled around in a horizontal circle at a speed of 6 m/s. The tension in the string is:

10N
20N
7.2N
none of these

12.Which of the following statements is false for a particle moving in a circle with a constant angular speed?

The velocity vector is tangent to the circle
The acceleration vector is tangent to the circle
The acceleration vector points to the centre of the circle
The velocity and acceleration vectors are perpendicular to each other

13.Which of the following statements about the centripetal and centrifugal forces is correct?

Centripetal force balances the centrifugal force
Both centripetal force and centrifugal force act on the same body
Centripetal force is directed opposite to the centrifugal force
Centripetal force is experienced by the observer at the centre of the circular path described by the body

14.The string of a pendulum is horizontal. The mass of bob attached to it is m. Now the string is released. The tension in the string in the lowest position, is:

mg
2mg
3mg
4mg

15.Let ? denote the angular displacement of a simple pendulum oscillating in a vertical plane. If the mass of the bob is m, the tension in the string is mg cos ?:

always
never
at the extreme positions
at the mean position

More Circular Motion Centre Of Mass QUESTIONS AND ANSWERS available in next pages

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