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Transcript
Momentum Momentum and changing momentum Momentum = mass x velocity (p = mv) Momentum is a vector quantity and is measured in Ns or kgms-1. For the same change in momentum, the force of impact decreases with increasing time of impact. Conserving momentum Law of conservation of momentum: In a collision, the total momentum of the colliding objects before collision is equal to the total momentum after collision, provided that there is no external force acting on the objects. mAu A mB u B mAv A mB vB Momentum KE conserved? conserved? Elastic collision yes Inelastic collision yes yes yes No Explosion No
