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



IIT JEE : Circular Motion Centre Of Mass QUESTIONS AND ANSWERS :: part1 : 16 to 20

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

16.A stone of mass 1 kg is tied at one end of string of length 1m. It is whirled in a vertical circle at constant speed of 4 m/s. The tension in the string is 6N when the stone is at: (g = 10 m/second square)

top of the circle
bottom of the circle
half way down
none of these

17.The speed of a particle moving in a circle is increasing. The dot product of its acceleration and velocity is:

negative
zero
positive
may be +ve or �ve

18.A car moving on a horizontal road may be thrown out of the road in taking a turn:

by a gravitational force
due to lack of proper centripetal force
due to the rolling frictional force between the tyre and road
due to the reaction of the ground

19.A small body of mass m slides down from the top of a hemisphere of radius R. The surface of block and hemisphere are frictionless. The height at which the body loses contact with the surface of the sphere is:

3/2 R
2/3 R
1/2 R
1/3 R

20.When a simple pendulum is rotated in a vertical plane with constant angular velocity, centripetal force is:

maximum at highest point
maximum at lowest point
same at all points
zero

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

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