Physics English Medium 9th Class Chapter 4 Turning Effect of Forces Short Question with Answers

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Online Short Questions For Chapter 4 "9th Class Physics English Medium Chapter 4 Preparation "

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Physics (New Book) - 9th Class Physics English Medium Chapter 4 Preparation

Question # 1

When a body is said to be in equilibrium

Ans 1: A body is said to be in equilibrium if no net force acts on it.

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Prepare Complete Set Wise Questions For Chapter 4 "9th Class Physics English Medium Chapter 4 Preparation "

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Set 10

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Set 12

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9th Class Physics English Medium Chapter 4 Preparation - Set 1

Question # 1

When a body is said to be in equilibrium

Ans 1: A body is said to be in equilibrium if no net force acts on it.

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9th Class Physics English Medium Chapter 4 Preparation - Set 2

Question # 1

Define unstable equilibrium

Ans 1: Unstable Equilibrium: If a body does not return to its previous position when set free after a slightest tilt is said to be in unstable equilibrium
Ans 2: Example: A pencil just balanced at its tip with centre of gravity at the highest position is the example of unstable equilibrium.

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9th Class Physics English Medium Chapter 4 Preparation - Set 3

Question # 1

Define rigid body and give an example

Ans 1: Rigid Body: A body is composed of large number of particles. It the distance between all pairs of particles of the body do not change by applying a force, then it is called a rigid body
Ans 2: Example: A door, A cylinder

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9th Class Physics English Medium Chapter 4 Preparation - Set 4

Question # 1

The weight of the ladder in fig produces an anticlock wise toruqe

Ans 1: Yes, the ladder is in state of equilibrium.

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9th Class Physics English Medium Chapter 4 Preparation - Set 5

Question # 1

Why a body does not regain its previous state in unstable equilibrium

Ans 1: Because in this state centre of gravity of body is at highest position.

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9th Class Physics English Medium Chapter 4 Preparation - Set 6

Question # 1

What is stat of neutral equilibrium.

Ans 1: Neutral Equilibrium; If a body remains in its new position when disturbed from its previous position, then body is said to be in neutral equilibrium.

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9th Class Physics English Medium Chapter 4 Preparation - Set 7

Question # 1

What is base

Ans 1: The smaller side of right angle triangle with angle is called base e,g the side AB in the figure is base.

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9th Class Physics English Medium Chapter 4 Preparation - Set 8

Question # 1

Define resolution of vectors

Ans 1: To split up a force into its perpendicular components is called resolution of forces.

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9th Class Physics English Medium Chapter 4 Preparation - Set 9

Question # 1

Define Centre of mass of a body

Ans 1: Centre of mass: The point where when the force is applied, the system move without rotation is called centre of mass.
Ans 2: Centre of gravity: A point where the whole mass of body appears to act vertically downwards
Example: Center of round plate is its center of gravity

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9th Class Physics English Medium Chapter 4 Preparation - Set 10

Question # 1

Does the fan satisfy second condition for equilibrium when rotating with uniform speed

Ans 1: Yes, It satisfy because moment arm is zero than

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9th Class Physics English Medium Chapter 4 Preparation - Set 11

Question # 1

What is head to tail rule

Ans 1: When two or more than two vectors are added such that the head of the first vector is joined with tail of second vector and finally the tail of first vector is joined with the head of the second vector. This method of addition is called head to tail rule. The vector joining the tail of first vector to the head of last vector is called resultant vector a Graphical method used to find the resultant of two or more forces is called head to tail rule.

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9th Class Physics English Medium Chapter 4 Preparation - Set 12

Question # 1

Which factor torque depends.

Ans 1: Torque = F X L So, Torque depends upon force and moment arm.

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Physics

4th Unit

9th class Physics Chapter 4 (English Medium)

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Matric Part 1/9th Class Physics Chapter 4 Short Question Test With Answer for Unit 4 Turning Effect of Forces

9th Class English Medium Subjects

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Online Short Questions For Chapter 4 "9th Class Physics English Medium Chapter 4 Preparation "

Physics (New Book) - 9th Class Physics English Medium Chapter 4 Preparation

When a body is said to be in equilibrium

Why a body cannot be in equilibrium due to single force acting on it

What is meant by perpendicular components

Define couple with the help of an example.

Differentiate between torque and couple

Define unstable equilibrium. Give one example

Define like parallel forces

Which factor torque depends.

Write the types of parallel forces

Define rigid body and give an example

Prepare Complete Set Wise Questions For Chapter 4 "9th Class Physics English Medium Chapter 4 Preparation "

Set 1

Set 2

Set 3

Set 4

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Set 9

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Set 12

9th Class Physics English Medium Chapter 4 Preparation - Set 1

When a body is said to be in equilibrium

Why a body cannot be in equilibrium due to single force acting on it

What is meant by perpendicular components

Define couple with the help of an example.

Differentiate between torque and couple

Define unstable equilibrium. Give one example

Define like parallel forces

Which factor torque depends.

Write the types of parallel forces

Define rigid body and give an example

9th Class Physics English Medium Chapter 4 Preparation - Set 2

Define unstable equilibrium

Define torque and Center of mass

Define parallel forces. Write n names of its types

When a body is said to be in equilibrium

Define Trigonometric ratio.

Define stable equilibrium with example

A ladder leaning at a wall as shown in figure is in equilibrium how

Why are vehicles made heavy at the bottom

What is meant by principle of moments?

What is 2nd condition for equilibrium

9th Class Physics English Medium Chapter 4 Preparation - Set 3

Define rigid body and give an example

What is 2nd condition for equilibrium?

Define Resultant vector.

Differentiate between clockwise and anti-clockwise moment

Define torque

Define stable equilibrium with example.

What is meant by resolution of forces?

How head to tail rule helps to find the resultant of forces

Define like and unlike parallel forces

When a body is said to be in equilibrium?

9th Class Physics English Medium Chapter 4 Preparation - Set 4

The weight of the ladder in fig produces an anticlock wise toruqe

Define equilibrium and give its example

Define first condition of equilibrium?

Why the height of a vehicle is kept as low as possible

Two children are sitting on the sea-saw such that they cannot swing

Define Resolution of forces

Differentiate between like and unlike forces.

Define resultant of forces and explain by diagram

Does the fan satisfy second condition for equilibrium when rotating with uniform speed

On which factor torque depends

9th Class Physics English Medium Chapter 4 Preparation - Set 5