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

On which factor torque depends

Ans 1: So, torque depends upon force and moment arm

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

Question # 1

On which factor torque depends

Ans 1: So, torque depends upon force and moment arm

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

Question # 1

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

Ans 1: A body cannot be in equilibrium due to a single force because a single force cannot be considered zero as a net force and the torque produced by it will also not be zero

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

Question # 1

At which point an applied force does not produce rotation

Ans 1: A force applied at the centre of mass of a body does not produce any rotation rather the body moves in the direction of applied force

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

Question # 1

Why the height of vehicles is kept as low as possible

Ans 1: The height of vehicles is kept as low as possible to make them more and more stable because stability increased as height of vehicle decrease.
Ans 2:

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

Question # 1

Define resultant of forces and explain by diagram

Ans 1: Resultant of forces: A resultant force is a single force that has the same effect as the combined effect of all the force to be added
Ans 2: Explanation: The Resultant of two forces A and B can be find by Head to Tail rule First select a suitable scale Draw the vectors of all the forces according to the scale.

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

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 7

Question # 1

What is centre of gravity.

Ans 1: A point where the whole weight of the body appears to act vertically downward is called centre of gravity of a body e.g. centre of gravity of uniform rod is centre of the rod.

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

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 9

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 10

Question # 1

What is meant by Couple of forces

Ans 1: Couple: A Couple is formed by two unlike parallel forces of the same magnitude but not along the same line.
Ans 2: Example: When a driver turns a vehicle, he applies forces that produce a torque. This torque turns the steering wheel These forces act on opposite sides of the steering wheel are equal in magnitude but opposite in direction. These two forces form a couple

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

Question # 1

Define moment arm.

Ans 1: The perpendicular distance between the axis of rotation and line of action of force is called moment arm.

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

Question # 1

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

Ans 1: When two forces are added with head to tail rule it gives the resultant of two forces, It gives the magnitude and direction both of the resultant force.

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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

On which factor torque depends

A force of 150 N is making an angle of 40 with horizontal surface what is its vertical components.

Differentiate between torque and couple

What is meant by perpendicular components

Define rigid body and give an example

Define Trigonometric ratio.

Give an example of a moving body which is in equilibrium?

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

Differentiate between like and unlike forces

Differentiate between clockwise and anti-clockwise moment

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

Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

Set 7

Set 8

Set 9

Set 10

Set 11

Set 12

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

On which factor torque depends

A force of 150 N is making an angle of 40 with horizontal surface what is its vertical components.

Differentiate between torque and couple

What is meant by perpendicular components

Define rigid body and give an example

Define Trigonometric ratio.

Give an example of a moving body which is in equilibrium?

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

Differentiate between like and unlike forces

Differentiate between clockwise and anti-clockwise moment

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

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

Write the principle of moments

Think of a body which is at test but not in equilibrium

Differentiate between clockwise and anti-clockwise moment

Head to tale rule explain?

What is line of action force

Define Resolution of vectors.

Think of a body which is at rest but not in equilibrium

At which point an applied force does not produce rotation

What is meant by resolution of forces?

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

At which point an applied force does not produce rotation

Define resultant of forces and explain by diagram

What is meant by additionof forces?

Differentiate between like and unlike forces

What is meant by principle of moments

Define stable equilibrium with example

Differentiate between clockwise and anti-clockwise moment

What is perpendicular

A force of 150 N is making an angle of 40 with horizontal surface what is its vertical components.

What is head to tail rule

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

Why the height of vehicles is kept as low as possible

What is Plumb line

Define Trigonometry.

Give an example of a moving body which is in equilibrium

Can force be added by ordinary addition of number

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

On which factor torque depends

Define parallel forces. Write n names of its types

Define unlike parallel forces.

Differentiate between stable and neutral equilibrium.

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