Physics 210 - Lecture 15 - Linear Momentum

UMKC Physics Professor Robert Riggs discusses linear momentum, elastic & inelastic collisions and center of mass

Category:

Education

Tags:

• elastic
• inelastic collision
• center of mass

[Black7Light]

@dragon95os walk da7eee7 ween ma rooo7t ...... al3n 5eraak .......... walk ba6eeel daa7

[dragon95os]

thumbs up if you wish your physics teacher know at least few of that

[IvanIb91]

@mousavi128 Because there's no external forces acting on the bodies in the moment of collision. There's a drop in kinetic energy because: 1) There is a slight raise in temperature in the instant of collision or 2) The body or bodies involved suffered a permanent damage, for instance in a car accident maybe one or the two cars involved get damaged. The energy of the collision is transfered in one or in every body involved in the collision.

[mothaafekheer]

I'm in ♥ with Paul McCartney!

[umeirdestination]

try deriving 2 equations for v (velocity) from the law of conservation of momentum and the law of conservation of energy. Solving the 2 two equations will result in u(initial velocity) = v(final velocity). Straight forward answer is that kinetic energy is converted to other forms like sound energy, internal energy, also heat energy. However the overall energy is conversed but not kinetic energy.

[trueshinchan]

@mousavi128 the momentum is derived within the time interval imidiately after collision

[mousavi128]

One question, how come in inelastic collisions, we have a drop in kinetic energy but the final momentum is the same as the initial, considering that K=1/2mv2 and P=mv.

[Jhoana8123]

Brilliant. I am a student at FIU and this lecture helps me understand the material so much better.

[nrusso42]

Professor Riggs is getting me through my accelerated Physics course - one lecture at a time!!!! Lectures are great - thanks for posting these!!!

[reck1ess77]

loll what a cool prof.

great lecture, thanks!