Question

Please help me!!! ***FAN & MEDAL***
Only one question...

Answer 1

Ball 1, with a mass of 20 kg, is moving to the right at 20 m/s. At what velocity should Ball 2, with a mass of 20 kg, move so that they both come to a standstill upon collision?

Answer 2

If you could explain it to me, that would be great. I may have more questions like this so I would love to know how to solve this type of question.

Answer 3

Mass times volume

Answer 4

? I don't know how to do this type of problem at all.

Answer 5

So, p1 = m1*v1 = 20 * 20 = 400 kg*m/s to the right ("positive" direction)
This means we need a "negative" 400 kg*m/s momentum to cancel it out.
p2 = m2*v2 --> -400 = 40 * v2 --> v2 = -400 / 40 = -10 m/s
So, Ball 2 should be moving 10 m/s to the left.

Answer 6

Well actually I know the formula. m1v1(initial) +m2v2(initial) = (m1+m2)vfinal

Answer 7

There you are friend

Answer 8

:o Thnxs.

Answer 9

Welcome