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

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

Ans 1: WA paratrooper coming down with the constant speed is in equilibrium as well as in motion.

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

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

Question # 1

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

Ans 1: WA paratrooper coming down with the constant speed is in equilibrium as well as in motion.

Submit

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

Question # 1

What is meant by principle of moments?

Ans 1: A body is balanced if the sum of clockwise moments acting on the body is equal to the sum of anticlockwise moments acting on its.

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

Question # 1

What is 2nd condition for equilibrium

Ans 1: A body is said to be satisfy 2nd condition of equilibrium if the resultant torque acting on a body is zero

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

Question # 1

Define like and unlike parallel forces

Ans 1: Like parallel forces: Like parallel forces are the forces that are parallel to each other and have the same direction
Ans 2: Unlike parallel forces: Unlike parallels forces are the forces that are parallel but have directions opposite to each other

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

Question # 1

Define torque

Ans 1: Turning effect of a force is called torque or moment of force
Ans 2: Unit: Its unit is newton metre (Nm)

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

Question # 1

Define torque and Center of mass

Ans 1: Torque: The turning effect of a force is called torque or moment of the force
Ans 2: Mathematically: Torque=f*L
Ans 3: Unit: SI unit of torque is Newton meter
Ans 4: Center of mass: Centre of mass of a system is such a oint where an applied force causes the system to move with out rotation
Rigid Body: A body is composed of large number of small particles. If the distance between all pairs of particles of the body do not change by applying of force then, it is called rigid body A rigid body is the one that is not deformed by force or force acting on it.
Ans 5: Moment Arm The perpendicular distance between the axis of rotation and the line of force is called moment arm of the force
Equation: In the expression Where L represents the moment arm of the force F

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

Question # 1

Differentiate between torque and couple

Ans 1: Torque: Turing effect of force is called torque .
To produce a torque we need only one force at least
Torque or moment of force is equal to product of force F and moment arm L
Ans 2: Couple Couple is formed by the two unlike parallel forces of the same magnitude but not along the same line
To produce a couple we need two unlike parallel forces at least
The torque of a couple is equal to product of any force of couple and perpendicular distance between them

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

Question # 1

Define centre of mass

Ans 1: Centre of mass of a system is a point where an applied force causes the system to move without rotation.

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

Question # 1

What is line of action force

Ans 1: A line along which a force acts is called line of action of the force

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

Question # 1

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

Ans 1: Given data: Give data F= 15N
0=40
Ans 2: Required Fy

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

Question # 1

Define Resultant vector?

Ans 1: A resultant vector is a single force that has the same effect as the combined effect of all the forces to be added.

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

Question # 1

How head to tail rule helps us to find resultant of vectors

Ans 1: To determine resultant vector by head to tail rule we have to draw the resultant vector from head of last to tail of 1st vector It given us resultant graphically

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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

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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

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

What is right angle triangle

Define Trigonometric ratio.

Define center of gravity

What is meant by resolution of forces?

At which point an applied force does not produce rotation

Define axis of rotation.

When a body is said to be in equilibrium

Define rigid body and give an example.

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

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 12

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

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

What is right angle triangle

Define Trigonometric ratio.

Define center of gravity

What is meant by resolution of forces?

At which point an applied force does not produce rotation

Define axis of rotation.

When a body is said to be in equilibrium

Define rigid body and give an example.

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

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

What is meant by principle of moments?

When a body is said to be in equilibrium?

What is Plumb line

Difference between like and unlike forces?

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

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

Define Resolution of forces

What is meant by additionof forces?

Define centre of mass

Define like parallel forces and moment arm

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

What is 2nd condition for equilibrium

What is the second condition of equilibrium

Define like and unlike parallel forces

Differentiate between torque and couple

Define axis of rotation.

What is line of action force

Give an example of a moving body which is in equilibrium

Difference between like and unlike forces?

Differentiate between like and unlike forces

What is hypotenuse

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

Define like and unlike parallel forces

How can we increase the stability of a vehicle

What is directional graph

Define Resolution of forces

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

Give an example of a moving body which is in equilibrium

Define couple arm.

Differentiate between clockwise and anti-clockwise moment

Write the types of parallel force.

Define moment arm.

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