Difference between conservation of energy and conservation of momentum
Answers
we use conservation of momentum when momentum is transferred by one thing to another to conserve it. first object loses its momentum while another gets its momentum so finally momentum is conserved.in your example as bullet strikes to wooden block,it loses its momentum but now wooden block gets its momentum so finally as much momentum was lost by bullet, same amount momentum is gained by wooden block. even its also of two types-linear and angular momentum of conservation.
some another examples will help you to understand better-
linear momentum conservation-
-When atoms collide with each other the law of conservation of momentum is followed.
-When the bullet hits the wooden block the law of conservation of momentum is followed and the block rises to a particular height.
-When two cars hit each other in an accident then the law of conservation of momentum is followed.
-When a baseball is hit by the bat the law of conservation of momentum is followed.
-When two runners collide in a race then the law is followed.
-Two billiard balls colliding with each other.
angular momentum conservation-
-During skating if the skater folds his or her hands then he is able to rotate at a greater speed as compared to when he opens his hands wide. This is on account of conservation of angular momentum.
now about energy conservation,in every field and everywhere total energy is going to be conserved as its fundamental law of nature. in your case kinetic energy of bullet is going to be converted in kinetic energy of wooden block and some heat energy also due to friction between bullet and wooden block, so finally total energy is conserved.
It goes is necessary to depend on the problem has analyzed, in case of the force of the flow in an elbow: it is necessary to to apply both the conservation of the energy and the conservation of the quantity of movement. As for the difference of result in both he is that the variations with regard to the time so much of the terms of energy as the quantity of movement are despised in general.