A partition is removed from a pathway, allowing objects on side of the path to move to the other side of the path freely. What simple machine was blocking the way?

A marble falls into a hole, but it finds that it rotates along a pathway on the edge of the hole. The marble continues to roll, picking up speed. At the end, it falls out of the bottom and lands on a ramp, changing direction. What kind of simple machine was used to move the marble?

Two weights of equal mass hang suspended in balance, connected by some kind of matter that keeps them balanced. When a toy car rolls onto one of the weights from a sloping platform, that weight falls, causing the opposite weight to climb upwards and begin a domino chain reaction. What kind of simple machine was hung in balance and moved when the weight changed?

Two weights of equal mass hang suspended in balance, connected by some kind of matter that keeps them balanced. When a toy car rolls onto one of the weights from a sloping platform, that weight falls, causing the opposite weight to climb upwards and begin a domino chain reaction. What kind of simple machine was attached to the bottom of the toy car, causing it to move towards the weight when gravity affected it?

Two weights of equal mass hang suspended in balance, connected by some kind of matter that keeps them balanced. When a toy car rolls onto one of the weights from a sloping platform, that weight falls, causing the opposite weight to climb upwards and begin a domino chain reaction. What kind of simple machine did the toy car travel on towards the hanging weights?

When more mass is applied to one side of the plane, the plane is now off balance, causing the side with lower mass to raise into the air, releasing the next step of the Rube Goldberg machine. What is this simple machine?

A small piece of wood hangs off the edge of a lever. Underneath it, Mentos are dropped into Diet Coke. When the chemical reaction begins, liquid and foam are spewed upwards, striking the underside of the wood, causing it to lift up and pushing the golf ball off it and onto the nearby track, where it travels down and gains speed. Which simple machine is the piece of wood?

A small piece of wood hangs off the edge of a lever. Underneath it, Mentos are dropped into Diet Coke. When the chemical reaction begins, liquid and foam are spewed upwards, striking the underside of the wood, causing it to lift up and pushing the golf ball off it and onto the nearby track, where it travels down and gains speed. Which simple machine is the track?

Marbles enter a funnel-like device, and at the end, they shoot out at a prearranged location. This location hits a spoon covered circular device that spins around a fixed point when the marble strikes the spoon. This spoon moves, causing an attached device to activate based on a pulled string. What is the simple machine we are referring to here?