Description

This mock test of Circular Motion MSQ for Physics helps you for every Physics entrance exam.
This contains 10 Multiple Choice Questions for Physics Circular Motion MSQ (mcq) to study with solutions a complete question bank.
The solved questions answers in this Circular Motion MSQ quiz give you a good mix of easy questions and tough questions. Physics
students definitely take this Circular Motion MSQ exercise for a better result in the exam. You can find other Circular Motion MSQ extra questions,
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*Multiple options can be correct

QUESTION: 1

One end of a light string of length ** L** is connected to a ball and the other end is connected to a fixed point

Solution:

Tangential acceleration is a_{t} = g cos θ which decrease with time.

Hence the plot of * a_{t}* versus time may be as shown in graph.

Area under graph in time interval **t**_{1} = * v_{B}* – 0 =

Area under graph in the time interval **t**_{2} = * v_{C}* –

Hence the under graph in time *t*_{1} and *t*_{2} is same.

∴ *t*_{1} < *t*_{2}

∴ *t*_{1} < *t*_{2}

The correct answers are:

*Multiple options can be correct

QUESTION: 2

A machine, in an amusement park, consists of a cage at the end of one arm, hinged at ** O**. The cage revolves along a vertical circle of radius

Solution:

Let ** N** be the normal reaction (Reading of the weighing machine)

Put ** v** ∴

⇒

hence

Now at

The correct answers are: the weight reading at ** A** is greater than the weight reading at

QUESTION: 3

A particle is moving in a circular path. The acceleration and momentum vectors at an instant of time are Then which of the following statement is incorrect

Solution:

*Multiple options can be correct

QUESTION: 4

A car driver going at some speed suddenly finds a wide wall at a distance ** r**. To avoid hitting the wall he should.

Solution:

When he applies brakes

if µ is the friction coefficient then * a* = µ

when he takes turn

Then we can see * r* <

The correct answer is: apply the brakes

*Multiple options can be correct

QUESTION: 5

Two particles ** A** and

Solution:

As when they collide

Now angle covered by

Put *t* ∴ angle covered by

The correct answers are: the time lapse for the two bodies to collide is the angle covered of ** A** is 11π/6

*Multiple options can be correct

QUESTION: 6

A smooth rod ** PQ** rotates in a horizontal plane about its mid point

Solution:

but ** R** =

(

Also r = 0.1 tan θ

put

We have cos θ = 3/5 and

The correct answers are: Tension in spring is 9.8

*Multiple options can be correct

QUESTION: 7

On a circular table, ** A** and

Solution:

The correct answers are: 0.5 *sec*, if A can not catch *B* within 0.5 sec

*Multiple options can be correct

QUESTION: 8

A small sphere of mass ** m** suspended by a thread is first taken aside so that the thread forms the right angle with the vertical and then released, then :

Solution:

By putting the value of *V _{B}*

T_{B} = 3mg cosθ

When total acceleration vector directed horizontally

The correct answers are: total acceleration of sphere as a function of thread tension as a function of θ is T = 3mg cos θ between the thread and the vertical at the moment when the total acceleration vector of the sphere is directed horizontal is

*Multiple options can be correct

QUESTION: 9

A section of fixed smooth circular track of radius 20 ** m**, in vertical plane is shown in the figure. A block is released from position

Solution:

By energy conservation between ** A** and

Now, radius of curvature

The correct answers are: velocity at point ** B** is Radius of curvature of trajectory when leaves point

*Multiple options can be correct

QUESTION: 10

A particle is describing circular motion in a horizontal plane in contact with the smooth inside surface of a fixed right circular cone with its axis vertical and vertex down. The height of the plane of motion above the vertex is ** h** and the semi-vertical angle of the cone is α. The period of revolution of the particle :

Solution:

Thus when ** h** increases

The correct answers are: increases as

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