Discussion
What is the momentum of cart A just before the collision?
*This question is included in 08. Momentum, question #13
| (A) | 1.5 kg m/s |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 02/04/2013 03:01
Why we don't have count the mass of A in this question
Posted: 02/04/2013 20:04
Adel, thanks for using the app. If you read the explanation, actually we did count when adding the momentum imparted by the force for 2s. But since A is originally at rest, v=0 and mv = 0. So the resulting momentum of cart A is coming only from F *∆t =3N * 2s, or 6kg m/s.