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y2o2
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if two bodies collided together, and the energy wasn't conserved.
can the linear momentum be still conserved ?!
 2 years ago
 2 years ago
y2o2 Group Title
if two bodies collided together, and the energy wasn't conserved. can the linear momentum be still conserved ?!
 2 years ago
 2 years ago

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y2o2 Group TitleBest ResponseYou've already chosen the best response.0
in other words does the conservation of momentum depends on the conservation of energy ?
 2 years ago

bmason Group TitleBest ResponseYou've already chosen the best response.1
Momentum is often conserved in collisions when energy is not. Momentum is conserved in a collision if there are no forces other than those acting between the objects in the collision. This is because of Newton's third law. If you add up all the forces acting on all the objects colliding, all the forces between object colliding add up to zero. If there are no other forces, the total force is zero so the total momentum doesn't change.
 2 years ago

evazhang_wow Group TitleBest ResponseYou've already chosen the best response.2
NO, conservation of momentum does not depend on energy. Momentum is always conserved. And actually energy is also always conserved. When we say there is loss of energy, we mean that the energy is lost in the form of heat or light that can not be presented by E=mv.
 2 years ago

y2o2 Group TitleBest ResponseYou've already chosen the best response.0
So if was told that two bodies collided , and there was an energy loss. can i use the relation (m1u1 + m2u2 = m1v1 + m2v2 ) ?
 2 years ago

bmason Group TitleBest ResponseYou've already chosen the best response.1
As long as there are no forces other than the forces between the two objects colliding, you can still use conservation of momentum, \[m _{1, initial} v_{1, initial} + m_{2, initial} v_2\]
 2 years ago
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