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 9 of 10.
Bilal said:
1 decade ago
The force applied should be an external 'unbalanced' force in that direction.
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.
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.
Lokesh Choudhary said:
1 decade ago
We know that energy can neither be created nor be destroyed but can change into another form.
Arbind rai said:
1 decade ago
We know that momentum is multiplication of mass & velocity and velocity never will be constant because velocity is vector quantity so momentum of any system not constant in any direction.
HARSHIL PRAJAPATI said:
1 decade ago
For example if we take the ball and it could apply force what is action of ball? - ball direction change and its apply to the force.
Ajay Borkar said:
1 decade ago
Principle of conservation of energy states that energy can neither be created nor be destroyed but can changes into another form.
And remaining statement shows about the law of linear momentum.
And remaining statement shows about the law of linear momentum.
Phanindra said:
1 decade ago
Principle of conservation states that energy neither be created nor destroyed but transfers from one form to another.
Bhuwan 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.
Velmurugan said:
1 decade ago
Principle of conservation energy states that energy can neither be created nor destroyed.
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