# Help with physics momentun concepts

1. Dec 11, 2011

### Sugi San

1. The problem statement, all variables and given/known data
i need help with this statements on momentums (we have to choose whether is yes or no)

A small cart carrying a small physics student (total mass = M) is designed to coast into the wall (at speed vi) and bounce off traveling in the opposite direction (at speed vf). In doing so, the wall must deliver an impulse to the cart. Which of the following suggestions would increase the magnitude of the impulse delivered by the wall. All nonspecified variables (vi, vf, and M) remain constant unless the stated conditions imply some change. For each statement select either Yes or No.

Statements

1. Halve the force and double the time of contact with the wall.
2. Increase the total mass of the cart and rider. yes?
3. Design the cart with a new bumper so contact time is decreased. no?
4. Make the cart experience a smaller change in momentum. yes?
5. Turn the cart around and back into the wall.
6.Decrease vf.

2. Relevant equations

3. The attempt at a solution
no
yes
no
yes
no

2. Dec 11, 2011

### PeterO

That is 5 "answers" for 6 questions. How do they line up? Which one did you not attempt?