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9th Class Physics chapter 3 Long Questions
9th Class English Medium Subjects
9th Class Urdu Medium Subjects
Online Long Questions For Chapter 3 "9th Class Physics Chapter 3 Long Question Preparation "
Try The Long Questions For 9th Class Physics Chapter 3 Long Question Preparation
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Total Questions10
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Available Sets2
Physics (New Book) - 9th Class Physics Chapter 3 Long Question Preparation
Question # 1
Explain Newtons second law of motion
- Ans 1: When a net force acts on a body, its produces acceleration in the body in the direction of the force. The magnitude of this acceleration is directly proportional to the net force acting on the body and inversely proportional to its mass
- Ans 2: Newton: One newton is the force that produces an acceleration of 1 ms-2 in a body of mass 1 kg1N= 1kg * 1ms-2or 1 N = 1kgms-2
9th Class Physics Chapter 3 Long Question Preparation - Set 1
Question # 1
Explain Newtons second law of motion
- Ans 1: When a net force acts on a body, its produces acceleration in the body in the direction of the force. The magnitude of this acceleration is directly proportional to the net force acting on the body and inversely proportional to its mass
- Ans 2: Newton: One newton is the force that produces an acceleration of 1 ms-2 in a body of mass 1 kg1N= 1kg * 1ms-2or 1 N = 1kgms-2
9th Class Physics Chapter 3 Long Question Preparation - Set 2
Question # 1
Write note on application of centripetal force
- Ans 1: There are many application of centripetal force but some are following
- Ans 2: Banking of roads: when a car takes a turn, centripetal force is needed to keep it in its curved track. The friction between the tyres and the road provides the necessary centripetal force. the car would skid if the force of friction between the tyres and the road is not sufficient enough, particularly when the roads are wet. This problem is solved by banking of curved roads . Banking of road means that the outer edge o a road is raised . Imagine a vehicle on a curved road. banking causes a component of vehicles weight to provide the necessary centripetal force while taking a turn. Thus banking of roads prevents skidding of vehicle and thus the deinking safe
- Ans 3: Washing machine dryer; the dryer of a washing machine is basket spinners. They have a perforated wall having large numbers of fine holes in the cylindrical rotor. The lid of the cylindrical container is closed after putting wet clothes in it. When it spins at high speed, the water from wet clothes is forced out thorough these holes due to lack of centripetal force
- Ans 4: Cream: separator: most modern plants use a separator to control the fat contents of various products. A separator is a high speed spinner. it acts on the same principle of centrifuge machines. The bowl spins at very high sped causing the heavier contents of milk move outward in the bowl pushing the lighter contents inward towards the spinning axis. Cream or butterfat is lighter than other components in milk. Therefore, skimmed milk. which is denser than cream is collected at the outer wall of the bowl. The lighter part ( cream0 is pushed toward the center from where it is collected thorough a pipe.
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