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 6 of 10.
Tarun Kumar Singh said:
3 years ago
True, when no change in momentum takes place either we say statically condition.
D.Laxman said:
3 years ago
The principle of law of conservation says that energy neither created nor destroyed.
Lokesh Choudhary said:
1 decade ago
We know that energy can neither be created nor be destroyed but can change into another form.
Sudhanshu shekhar rana said:
1 decade ago
I think the correct answer will be option(A) because in order to change the momentum of any system in any dirn we will need to change the velocity which occurs only when there is net external force on the system.
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.
Venu said:
5 years ago
Energy neither created nor to be destroyed but it is a form of energy according to principle of the law of conservation of energy.
Paatel said:
6 years ago
According to the conservation of energy, the energy neither be created and nor be destroyed it can transform one state to another state only.
Shai said:
1 decade ago
The statement is newton's first law.
Satyajit Sahu said:
1 decade ago
Here, there may be variation of air resistance and road evenness for that, it would change its momentum.
Mukesh said:
1 decade ago
Free molecule have different masses & momentum so without acting force.
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