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Projectile motion question

Asked by AeonErion | May 9, 2011 | AS Level > Physics > Revision
AeonErion
A projectile of mass m is fired with velocity v from a point P which is 45 degrees to the horizontal. Neglecting air resistance, the magnitude of the change in momentum between leaving P and arriving at Q is: A zero B 1/2mv C mvroot2 D mv E 2mv
SZPoints: 6 | Difficulty: Hard | Comments: 2 | Unanswered

2 Comments

AeonErion, 9 May, 2011 @ 01:37
Author Comment
I need an explanation on how to get the answer, please?
bunnyfrog, 17 Jun, 2011 @ 13:39
Comment

Ok, so think about your equations of motion, for example v=u+at, or  in the case of this question Ek= 1/2 mv2 or to spell it out, kinetic movement equals half (mass times velocity squared).

So, the change in momentum obviously does not equal zero, so that removes A. Of the other answers, which corresponds to the equation of movement that you need?

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