Question

Ina shoots a large marble (Marble A, mass: 0.08 kg) at a smaller marble (Marble B, mass: 0.05 kg) that is sitting still. Marble A was initially moving at a velocity of 0.5 m/s, but after the collision it has a velocity of –0.1 m/s. What is the resulting velocity of marble B after the collision? Be sure to show your work for solving this problem along with the final answer.

Answer 1

well since no external force is acting on the system..conserve the linear momentum of the system..and you will get it..

Answer 2

Simpler terms, please? :)

Answer 3

well in simpler terms...
first of all choose your sign convention..
now,, the marble A that ina throws has some constant velocity...and so it has some constant momentum....whereas the marble B is sitting still,, so no velocity no momentum...this is the condition of the system(marble A+B) before the collision...
now during collision since no external foces are coming into play...and only the internal forces are acting on this system..so the momentum remains conserved before and after the collision...so now marble A has some other velocity and marble B has some velocity..
just use the sign convention properly..and it would be a cakewalk..:)