The Refrigerator ProblemBy Cassidy Welsh and Harrison Crabtree

Free Body Diagram Before our Innovation

Initial Motion Constant Velocity Motion

Fn 15.4154N

Fg 15.4154 N

Fa 5NFstatic 5N

Fnet= 0

Fn 15.4154N

Fa 3N

Fg 15.4154N

Ff 3N

Fnet=0The forces acting on this object are balanced because the Fnet=0. This is right before it starts to move, so it is not accelerating.

The forces acting on this object is balanced because the Fnet=0. Though the fridge is not accelerating, it is moving at a constant velocity.

Our DesignOur design is well made. It is made of a wood block with two different size holes. Within the two sized holes is a marble. On top of the marble is is a thin slice of wood with a hole so the marble can peek through. A bungie cord is attached to the whole contraption to ensure that the brick will not fall. In the next few slides, you will see pictures of the contraption.

Here is out design with the brick on it. The bungee cord holds the brick in its place so it does not fall over. More hooks are placed on the sides to be able to pull the brick across the floor.

Here is a birds eye view of our design. As you can see, there are four hooks so you can pull in any direction.

Our innovation is very thin for easy transport and can easily fit anywhere. It is also lightweight with only two layers of wood!

This is the bottom of the innovation. There are four secure marbles on the bottom so it can roll in any direction. The marbles do not leave their place when you lift the contraption up, and they roll smoothly across the floor.

Inside here is one hole with a wider opening at the front. This allows the marble to move.

Free Body Diagram After Our Amazing InnovationInitial Motion Constant Velocity

MotionFn 15.4154

Fa 3N

Fg 15.4154

Fstatic 3N

Fnet=0

The forces acting on this object are balanced because the Fnet=0. Though, it is not because this is just before it starts.

Fn 15.4154

Fa 1N

Fg 15.4154

Ff 1N

Fnet=0

The forces acting on this object are balanced because the Fnet=0. This object is not accelerating, but is infact moving at a constant speed.

Why Did Our Innovation Work?Our innovation works because it lowers the amount of Newtons and friction (less of the rough surface is touching the ground so it reduces friction) from start to finish. With the roller balls on the bottom, it glides smoothly against the floor. Our innovation is also very sturdy, so it will not break. This is a truly genius contraption with a complex design.