Mechanical Engineering - Engineering Mechanics - Discussion

Discussion Forum : Engineering Mechanics - Section 1 (Q.No. 1)
1.
According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
97 comments Page 8 of 10.

Shai said:   1 decade ago
The statement is newton's first law.

Vivek said:   1 decade ago
Its not law of conversation of energy. It is a part off statement from newton's law.

Anant gyan punj said:   1 decade ago
The reason is that total momentum includes linear and angular momentum, since linear momentum is conserved in that direction if external force is not acting in that direction. But angular momentum may or may not be conserved as that force may create torque. Hence total momentum will not be conserve.

Suresh kumawat said:   1 decade ago
The statment is related to the newton's second law.

NamrAta Mishra said:   1 decade ago
According to law of conservation of energy charge cannot be created nor destroyed but transferred from one body to other so if two bodies collide their mass will change automatically whether or not an external forces Are applied.

Sachendra chaturvedi said:   1 decade ago
This principle is called conservation of momentum.

Srikanth said:   1 decade ago
Principle of conservation of energy states that energy can neither be created nor be destroyed but can be transformed from one form to another form.

Purnendra said:   1 decade ago
Momentum is a vector quantity so change in direction change the momentum.

Vinay said:   1 decade ago
There is no description of external momentum and secondly force may be applied in any direction and here only one direction is described. But according to newton I can say it is wrong.

Farrukh waseem said:   1 decade ago
The principle of energy says that the energy in any system can't be created and also destroyed infect one thing is possible that it changes in another form.


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