Momentum of a body is 1. a vector quantity. 2. a conserved quantity in an isolated system. 3. same as force in linear motion. Select the correct answer using the code given below :

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Q: 38 (NDA-II/2011)
Momentum of a body is
1. a vector quantity.
2. a conserved quantity in an isolated system.
3. same as force in linear motion.
Select the correct answer using the code given below :

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,3,12,2,3,3,7

keywords: 

{'momentum': [0, 1, 0, 3], 'linear motion': [0, 0, 0, 1], 'conserved quantity': [0, 0, 0, 1], 'vector quantity': [0, 1, 0, 0], 'body': [27, 3, 23, 37], 'isolated system': [0, 0, 0, 1], 'force': [0, 0, 0, 2]}

The correct answer is option 3: 1 and 2 only.

Let`s break down each option:

1. Momentum of a body is a vector quantity: The momentum of a body is indeed a vector quantity because it has both magnitude and direction. The direction of momentum is the same as the direction of the velocity of the body.

2. Momentum is a conserved quantity in an isolated system: This statement is true. According to the law of conservation of momentum, the total momentum of a system remains constant if no external forces act on it.

3. Momentum is the same as force in linear motion: This statement is incorrect. Momentum and force are not the same. Momentum is the product of mass and velocity, while force is the product of mass and acceleration. They are related but not the same.

To summarize, the momentum of a body is a vector quantity and is conserved in an isolated system. It is not the same as force in linear motion. Therefore, option 3 is the correct answer.