00:01
For this problem, to begin, we know that momentum, often used, often symbolized with the symbol p, is equal to mass times velocity, where momentum is often treated as a vector, but in this case i'll be treating it essentially, pardon me, essentially as a one -dimensional quantity or a scalar.
00:21
So let's see here, we know that we are given that the mass of the rubber ball is 0 .8 kg.
00:30
We know that its initial velocity is equal to 0 .96 m per second, or actually, we can, i'll put it this way, since it's initially heading downwards, its initial velocity is negative 0 .96 m per second, and then its resulting velocity afterwards, v2, is positive 0 .96 m per second, because now it's heading upwards...