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Turning Effect of Forces:

The most interesting and important Subject Physics of 9th Class Chapter-04. Student want to know the important Questions and  physics notes for 9th class , to prepare it according to BISE Punjab. We are providing the Solution of Student Problems.

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Turning Effect of Force

Physics Ch-04, 9th

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1 / 55

If the Rotation is produced in Clock wise direction, then the Torque is taken as_________

2 / 55

The position of the center of gravity depends upon the________ of the body.

3 / 55

In Neutral equilibrium, the center of gravity ________ than the original position.

4 / 55

The perpendicular distance between the line of action of force and center of rotation and denoted by ‘r’ is called_______

5 / 55

The force which is acting perpendicularly downwards towards the earth is called________

6 / 55

If the direction of parallel forces is the same, then these are called ______ forces.

7 / 55

If the rotation produced in anti-clock wise direction, then the torque is taken as______

8 / 55

According to Second Law of Equilibrium, the sum of all the torques acting on the body should be ______

9 / 55

There are __________ States of equilibrium.

10 / 55

The Rotational effect of a body is measured by a quantity known as________

11 / 55

During Rotation the particles of the body rotate along fixed circles. The straight line joining the centers of these circles is known as________

12 / 55

Value of sin 30° is _________

13 / 55

The Torque produced in a body due to a Couple is equal to the product of one of the forces and the ____

14 / 55

The center of Gravity of parallelogram, rectangle, square is the______

15 / 55

In System International, the unit of torque is_________

  1. N
  2. Nm-2
  3. Nm-1
  4. Nm

Which Option is Correct ?

16 / 55

First Condition of Equilibrium is represented by________

17 / 55

A book lying on the table is an example of ___________ Equilibrium.

18 / 55

The direction of torque is determined by __________ rule.

19 / 55

Torque is a _________ quantity.

20 / 55

A __________is always acting while opening or closing water tap, a lock, stopper of a bottle or jar.

21 / 55

The point at which whole weight of the body appears to act is called___________

22 / 55

The type of Equilibrium in which after disturbance, the body again comes to rest position and center of gravity remains unchanged?

23 / 55

Sigma (∑) is the Greek letter which is used to represent______

24 / 55

According to First Condition of Equilibrium, the sum of all the forces acting on the body should be _____

25 / 55

If the direction of parallel forces is the opposite, then these are called ____________ forces.

26 / 55

In Unstable equilibrium, the center of gravity is ____________ than the original position.

27 / 55

In Stable Equilibrium, the center of gravity is ____________ than the original position.

28 / 55

A Meter Rod on a wedge is an example of __________ equilibrium.

29 / 55

Racing cars are made stable by______

30 / 55

The center of Gravity of Cylinder is the___________

31 / 55

A force of 10-N is making an angle of 30° with the horizontal. Its horizontal component will be ____

32 / 55

The Equilibrium in which the body comes back to its original condition when set free after slightly lifting from one side is _________ equilibrium.

33 / 55

Two equal but unlike parallel forces having different line of action produces____

34 / 55

A body is in equilibrium when its_____________

35 / 55

According to Right Hand Rule, if ___________ is along the curl of the fingers of the right hand then the thumb points in the direction of the torque.

36 / 55

A body is in natural equilibrium when its center of gravity____________

37 / 55

If a number of forces act on a body such that their points of action are different but lines of action are parallel to each other than these forces are known as ____________forces.

38 / 55

Addition of vectors are done by_________

39 / 55

There are _________ conditions of equilibrium.

40 / 55

Second Condition of Equilibrium is represented by___________

41 / 55

Component of a vector acting along the y-axis is called_____________

42 / 55

Component of a vector acting along the X-Axis is called__________

43 / 55

The number of perpendicular components of forces are_______

44 / 55

The Equilibrium in which the body does not come back to its original condition when set free after slightly lifting from one side is ____________ equilibrium.

45 / 55

A couple is formed by_______

46 / 55

When an object is resting on the smooth horizontal surface, the weight of the object is balanced by ____

47 / 55

The center of gravity of a regular shaped body is always on its center of _____________

48 / 55

The Rotation produced in a body depends upon ___________ factors.

49 / 55

When the sum of all the force acting on a body is zero or the object is moving with uniform velocity then it will be in __________

50 / 55

The number of forces that can be added by head by head to tail rule are____

51 / 55

The __________ of a racing car is kept low to make its stable.

52 / 55

Motion of the football on the ground is an example of ________ Equilibrium.

53 / 55

The Center of Gravity of Triangle is the_________

54 / 55

If the center of gravity of the body is below the fulcrum, then the body will be in ___________ equilibrium.

55 / 55

When two equal, opposite and parallel forces act at two points of the same body, they form a_______

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MCQs PHYSICS 9TH CHAPTER # 04

(Download in pdf format)

(Correct Answers has shown at front end of each question)

 


NUMERICAL PHYSICS 9TH CHAPTER # 04

(Download in pdf format)


LONG QUESTIONS PHYSICS 9TH CHAPTER # 04

(Download in pdf format)


TEXT BOOK EXERCISE SOLUTION PHYSICS 9TH CHAPTER # 04

(Download in pdf format)


Physics Notes, Numerical for Class 9th

If your are talking about the Study material of Class 9th Physics Notes chapter-04, Physics Notes for 9th Class Chapter-04, eStudent.pk is providing same helpful content against each chapter of Physics Class 9 notes pdf downloadable format of PTB book. For each chapter  there are short questions, long question, multiple-choice questions, and numerical. Similarly, in the case of extra material, there are long questions, short questions, and multiple-choice questions. So, every student can check these notes and prepare for exams.

How did we prepare from these notes? any Student of 9th class should prepared all the long question of each chapter first and practiced all the numerical as well in good grip. Then he should skimmed through all the multiple-choice question and short questions of same chapter. That should be enough for him to prepare a chapter and secure good marks in exams. All reader should use this technique if you like this.

Chapter wise PDF Notes / Problems / Numerical Solution of Physics

                  Chapter-01 – Physical Quantities and Measurements

                  Chapter-02 -Kinematics

                  Chapter-03 – Dynamics

                  Chapter-04 – Turning Effect of Forces

                  Chapter-05 – Gravitation

                  Chapter-06 – Work and Energy

                  Chapter-07 – Properties of Matter

                  Chapter-08 – Thermal Properties of Matter

                  Chapter-09 – Transfer of Heat

                  Pairing Scheme for 2021 – Physics 9th Class

One thought on “Physics Notes for 9th Class Chapter-04”

  1. Anonymous says:

    Kindly fix Chapter 04 Numericals (download in pdf format link).

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