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Accelerate NEET 2020: Circular Motion Class 3 (20.11.2019)

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Question 1

The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the fig.

y - projection of the radius vector of rotating particle P is :

Question 2

Direction: In each of the following question a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as:

Assertion: In a non-uniform circular motion, the acceleration of the particle is equal to the sum of the tangential acceleration and the centripetal acceleration.
Reason: The two accelerations are perpendicular to each other.

Question 3

The earth circles around the sun once a year. The work which would have to be done on the earth to bring it to rest relative to the sun is, (Ignore the rotation of earth about its own axis) given that the mass of the earth = 6×10²⁴ kg and the distance between sun and earth is 1.5×10⁸ km)

Question 4

A particle slides on surface of a fixed smooth sphere starting from topmost point. The angle rotated by the radius through the particle, when it leaves contact with the sphere, is

Question 5

A biker propels his bike in circular motion in his stunt of ‘The Wall of death’ having radius of 15 m. What will be the magnitude of linear acceleration of biker if he moves with uniform speed and completes one circle in 4 s?

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Nov 23NEET & AIIMS