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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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