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.
Discussion:
97 comments Page 2 of 10.
Anil Shukla said:
1 decade ago
Law of conservation of energy: Energy is neither created nor destroy but its can be change one form to another form.
Law of linear momentum: The total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.
BOTH LAWS OPPOSE EACH OTHER?
Law of linear momentum: The total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.
BOTH LAWS OPPOSE EACH OTHER?
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.
Kirankumar said:
1 decade ago
The total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction. This is right. But in our question is according to conservation of energy. Without external force concern. The body should move. Energy neither created nor destroyed.
Adarsh Upadhyay said:
7 years ago
The law of conservation of energy is a physical law which states energy cannot be created or destroyed, but may be changed from one form to another.
Another way of stating the law is to say the total energy of an isolated system remains constant or is conserved within a given frame of reference.
Another way of stating the law is to say the total energy of an isolated system remains constant or is conserved within a given frame of reference.
Divyanshu said:
1 decade ago
Momentum doesn't need constant force, if a body is accelerating in a direction then there must be a constant force applied on it, also the question is asking about SYSTEM OF MASSES, of which momentum can be changed in a by applying force in any direction & not in particularly that direction.
Nikhil said:
1 decade ago
For the momentum we need mass and the movement of the mass so it is the phenomenon which deals with the moving mass interaction and also a continuous change which can never be constant. Because momentum = mass *ds/dt and ds/dt term is a continuous change of displacement with respect to time.
Siddharth Surendran said:
7 years ago
According to the principle of conservation of energy.
Energy can neither be created nor be destroyed but can be transformed from one for to another.
But here given is the principle of conservation of momentum with the tagline of conservation of energy.
Therefore the answer is false.
Energy can neither be created nor be destroyed but can be transformed from one for to another.
But here given is the principle of conservation of momentum with the tagline of conservation of energy.
Therefore the answer is false.
Jalesh Kumar Thakur said:
2 years ago
I think the given Statement is not correct.
There should be momentum conservation. And according to the principle of conservation of momentum, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.
There should be momentum conservation. And according to the principle of conservation of momentum, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.
(4)
Ashish said:
10 years ago
Energy conservation principle is it can't be created nor it can be destroyed we can consider system having heat stored in it now we can remove heat from system and can transfer to heat sink and we can add more to it from heat source into system but we can't destroy heat.
SHIVANAND PAL said:
9 years ago
The law of conservation of energy states that in a closed system the total amount of energy is conserved and does not change. This means that energy may change from one form to another, but that the total amount of energy in the closed system remains constant.
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