VARITASIUM ACCELERATING CART WORKING USING GRAVITY!
This is an accidental discovery. Here I used the Algodoo 2D physics simulator to model a faster than the board cart (featured in the Varitasium video $10,000 scientific bet video). This cart has a mass attached to the outside edge of the big wheel to produce a pendulum affect. Gravity pulls on the mass causing the cart to accelerate with sufficient force to conserve some of the energy and add it to the next swing, thus the cart evidently accelerates using only the force of gravity! A discovery worth further investigation on better simulation software! This is a very low friction simulation with air resistance turned off.