Cart Propelled by Weighted Balls Down an Incline

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SUMMARY

The discussion centers on the feasibility of propelling a cart using the momentum of weighted balls rolling down an incline. The experiment involves five balls of varying weights and different ramp lengths, but the user reports that the cart only moves when given an initial push. Theoretical considerations suggest that while the initial balls may move backward due to momentum differences, subsequent balls should theoretically move in the same direction as the cart. The conclusion drawn is that without external forces, achieving propulsion solely through the balls' weight may be impossible.

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Okay, I got another problem for you guys that I have been trying to figure out. Here first is the diagram:

Cart.jpg


I have been experimenting with different weights of balls and different weights of cars, also different ramp lengths. 5 balls are supposed to be used. Nothing seems to work at all. I am wondering if it is even physically possible now. The only time I can get it to work is if I propel the car by giving it a push first, but that is not the object of the car. It is supposed to be propelled by the weight of the balls pushing the car as they are rolling down the incline. Once they have rolled off of the ramp, due to the momentum of the car compared to the momentum of the ball the first couple should backwards in the opposite direction of the car, but then as the car goes faster, it should impart a greater momentum on the remaining balls on the cart therefore the later ones after rolling off of the cart will move in actually the same direction as the cart is travelling. What do you guys think is this possible to recreate? Or is it only theoretically possible, or just plain impossible without the help of outside forces? Thanks ahead of time for any help.
 
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