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Both the bodies approaching towards each other and collide.
Usually, this means the angle between the two velocity vectors of the two moving objects is zero. This is still pretty ambiguous.
hmm. is there any condition i??like referring to centre of mass and all?
I suppose not
That is another consideration. Like I said, this is ambiguous. We could define the velocity vectors are being parallel and the center of masses to be co-linear. The line containing both center of masses should also be parallel to the velocities.
|dw:1327850906578:dw| are both a and B head on collision?
http://hyperphysics.phy-astr.gsu.edu/hbase/colsta.html I think so
well i hav a figure can u xplain it ??
They could be depending on the definition. Again, this is ambiguous. We need to first define a head on collision before we can identify one. Typically the "head" of an object is that that is furthest from the center of mass in the direction of the velocity. Think of a nose on an airplane as being the "head."
I would say that only B is a "head on" collision.
?are u sure??
can u reason?
look at ash's link
No. Because we haven't adequately defined head on collision! LISTEN!
There is no formal definition as far as I can tell. We need to define it here for the context of this problem.
Center of masses - Co-linear. Velocities - parallel, co-linear, line containing center of mass contains vectors defining velocities. We need to decide is the relative velocities matters. That is, for a collision to be head-on, should the objects be travelling towards each other? Can one be at rest? Can they be travelling in the same direction?
ya thats wat i am asking u asking dis to me lol :)
accordind to ur definition if velocities are parallel the bodies wont move towards each other!!
They can be parallel and have opposite signs.
I would not consider two objects travelling in the same direction as being a "head-on" collision. Instead it would be a "head to tail" collision.
the meaning of head on collision that I have come across always indicates a collision of two bodies "heading towards one another". i.e. "B" in your diagram above. "A" in your diagram above is usually referred to as a "rear-end collision". But I cannot be certain if these are the "true" definitions of the terms.
k i got it now can u guys xplain to me what is said in that diagram above??it is about a motion of ball bouncing and eventually reaching reat can u say hw we got those eqns like e^2h
srry rest not reat
Please post that question as a separate post, with adequate explanation.
As a separate question. Not here.