- #1

Eobardrush

- 18

- 3

- Homework Statement
- This is for the end of chapter homework from a textbook(I do self study)

- Relevant Equations
- P=Mv

Delta P= mv-mu

Question 2a: It is really hard for me to get my head around this.

The solution of this question mentions the momentum of the ball after it rebounds is 12kgms. My attempt at this solution is as follows

Before collision

Momentum of ball= mv= 2x3= 6 kgms and momentum of wall= 0

Therefore Total momentum of system before collision= 6+0= 6kgms

But since momentum of the system is conserved that means the total momentum of the system before collision should equal to the total momentum of the system after collision

And since the total momentum before collision is 6 kgms, shouldn't the total momentum after collision should be equal to 6kgms too??

I don't understand how the balls momentum suddenly increases twice fold to 12kgms

I do understand that change in momentum equation mv-(-mv) results in 12kgms but it still is bugging me because I really do not get why the ball momentum suddenly increases to 12kgms despite it being at the same speed and mass. It kind of gives the sense that the momentum suddenly increased out of nowhere