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9th Class Physics Chapter 4 Online Preparation
9th Class English Medium Subjects
9th Class Urdu Medium Subjects
Online Short Questions For Chapter 4 "9th Class Physics English Medium Chapter 4 Preparation "
Try The Short Questions For 9th Class Physics English Medium Chapter 4 Preparation
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Total Questions10
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Available Sets12
Physics (New Book) - 9th Class Physics English Medium Chapter 4 Preparation
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.
Prepare Complete Set Wise Questions For Chapter 4 "9th Class Physics English Medium Chapter 4 Preparation "
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Set 1
10 Questions
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Set 2
10 Questions
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Set 3
10 Questions
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Set 4
10 Questions
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Set 5
10 Questions
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Set 6
10 Questions
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Set 7
10 Questions
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Set 8
10 Questions
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Set 9
10 Questions
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Set 10
10 Questions
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Set 11
10 Questions
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Set 12
10 Questions
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9th Class Physics English Medium Chapter 4 Preparation - Set 1
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.
9th Class Physics English Medium Chapter 4 Preparation - Set 2
Question # 1
The weight of the ladder in fig produces an anticlock wise toruqe
- Ans 1: Yes, the ladder is in state of equilibrium.
9th Class Physics English Medium Chapter 4 Preparation - Set 3
Question # 1
Define axis of rotation.
- Ans 1: The line about which a body rotates is called axis of rotation.
9th Class Physics English Medium Chapter 4 Preparation - Set 4
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.
9th Class Physics English Medium Chapter 4 Preparation - Set 5
Question # 1
Define Resultant Vector
- Ans 1: A resultant vector is a single vector that has the same effect as the combined effect of all vector to be added
9th Class Physics English Medium Chapter 4 Preparation - Set 6
Question # 1
Define stable equilibrium with example
- Ans 1: Stable Equilibrium: A body is said to be in stable equilibrium if after a slightest tilt it returns to its previous postion.
9th Class Physics English Medium Chapter 4 Preparation - Set 7
Question # 1
Define equilibrium
- Ans 1: Equilibrium: A body is said to be in equilibrium if no net force acts on it. A body in equilibrium thus remains at rest or moves with uniform velcity
9th Class Physics English Medium Chapter 4 Preparation - Set 8
Question # 1
What is Plumb line
- Ans 1: Plumb line: A plumb line consists of a small metal bob lead or brass supported by a string. When the bob is suspended freely by the string, it rests the vertical direction due to its weight acting vertically down ward.
9th Class Physics English Medium Chapter 4 Preparation - Set 9
Question # 1
Define plumb line?
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Ans 1: A plum
be line is a piece of string with a weight attached to the end that is used to check that something such aswall is vertical
9th Class Physics English Medium Chapter 4 Preparation - Set 10
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.
9th Class Physics English Medium Chapter 4 Preparation - Set 11
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.
9th Class Physics English Medium Chapter 4 Preparation - Set 12
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.
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Ans 2:
9th class Physics Chapter 4 (English Medium)
Here you can prepare 9th Physics Chapter 4 online Short Questions Preparation (Turning Effect of Forces). Click the button for 100% free full Preparation.
