Recent content by katrvu

any idea?

based on the question the 2nd object must be less because it's final speed is much faster, this is because of impulse I believe. The question doesn't say 2nd object is at rest, so 2nd object should have initial speed and collide head on. any suggestions? thanks

well, it says it's elastic collision. so I came up with the following conservations: let x direction be positive 1. from conservation of momentum mv1-mv2=mv1f+mv2f mv1-mv2=mv1f+m8v1f 2. from conservation of energy 1/2mv1^2+1/2mv2^2=1/2mv1f^2+1/2mv2f^2 mv1^2+mv2^2=mv1f^2+m64v1f^2 but...

An object with mass 3.6 kg is moving in the positive x direction when it strikea second object head-on. THe collision is elastic and afterwards both objects are moving in the positive x direction. If the final speed of the second object is equal to 8 times the final speed of the first object...