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Test: Circular Motion


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10 Questions MCQ Test Physics Class 11 | Test: Circular Motion

Test: Circular Motion for NEET 2023 is part of Physics Class 11 preparation. The Test: Circular Motion questions and answers have been prepared according to the NEET exam syllabus.The Test: Circular Motion MCQs are made for NEET 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Circular Motion below.
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Test: Circular Motion - Question 1

A stone of mass 5 kg is attached to a string of 10 m length and is whirled in a horizontal circle. The string can withstand a maximum tension of 160 N. The maximum velocity of revolution that can be given to the stone without breaking the string is

Detailed Solution for Test: Circular Motion - Question 1

Max tension =  Max. Centripetal force

160= mv^2 / r  => v^2  =  160 *10 / 5   =>  V= 17.88.

Test: Circular Motion - Question 2

The acceleration of the particle performing uniform circular motion is

Detailed Solution for Test: Circular Motion - Question 2

We know that centripetal force is required for an object to travel in an circular motion thus the acceleration of the object in circular motion will be (mv2/r) / m

Test: Circular Motion - Question 3

It is advised to drive along the slippery road slowly, because:

Detailed Solution for Test: Circular Motion - Question 3

It is advised to drive along the slippery road slowly, because friction is reduced and if the driver is driving at a larger speed there is a risk of skidding.

Test: Circular Motion - Question 4

Centripetal force always acts at 90 degrees to the velocity, and away from the centre of the circle.

Detailed Solution for Test: Circular Motion - Question 4

Centripetal always act towards centre.as centrifugal act away from centre.

Test: Circular Motion - Question 5

Railway tracks are banked at the curves so that the necessary centripetal force may be obtained from the horizontal component of the reaction on the train.

Detailed Solution for Test: Circular Motion - Question 5

True. Railway tracks are banked at the curves so that the necessary centripetal force may be obtained from the horizontal component of the reaction on the train.

Test: Circular Motion - Question 6

Which of the following is called a fictitious force?

Detailed Solution for Test: Circular Motion - Question 6

Centrifugal force, a fictitious force, peculiar to a particle moving on a circular path, that has the same magnitude and dimensions as the force that keeps the particle on its circular path (the centripetal force) but points in the opposite direction.

Test: Circular Motion - Question 7

At which place of the earth, the centripetal force is maximum

Detailed Solution for Test: Circular Motion - Question 7

The shape of earth is geoid due to which radius of earth is 14km shorter at equator than on poles. And as centripetal force, f = mv2 /r
We get f is maximum at the equator.

Test: Circular Motion - Question 8

The maximum speed at which a car can turn round a curve of 400 m radius on a level road is: (Given: coefficient of friction between the tyres and road is 0.1, and g = 10 m/s2)

Detailed Solution for Test: Circular Motion - Question 8

When the car moves in a curvature of radius R, the force acting towards the centre of curvature must be equal to mv2/R 
where m is mass of the car, v is the speed of car
But when we draw the free body diagram of the car the only force towards the centre of curvature is the friction force which is f = μmg
Hence by comparing we get v = √μgR
Substituting values gives, v= 20ms-1

Test: Circular Motion - Question 9

The angle through which the outer edge is raised above the inner edge is called

Detailed Solution for Test: Circular Motion - Question 9

A banked turn (or banking turn) is a turn or change of direction in which the vehicle banks or inclines, usually towards the inside of the turn. The bank angle is the angle at which the vehicle is inclined about its longitudinal axis with respect to the horizontal.

Test: Circular Motion - Question 10

A model aeroplane is tethered to a post and held by a fine line. It flies in a horizontal circle. Then the line breaks. What direction will it fly in?

Detailed Solution for Test: Circular Motion - Question 10

It is because at every point of circle an object has two acceleration (Tangential & Angular acceleration).At every point a body experience a tangential force which is perpendicular to the radius of the circle, when the string breaks the centripetal force disappear ( the radially inward force which holds a body in a circular motion) Hence the only Tangential force act on the body & it goes in that way.

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