spring scale/force diagram

The spring scale measures force in newtons. When the mass your holding up is completly on the spring scale, then the force exerted on the weight is from the earth (arrow pointing down) and the spring scale (arrow pointing up). When the weight is slightly on the table, but still on the spring scale, then the force arrow going up is split between the table and the spring scale. The earth is still the bottom arrow. When the weight on the spring scale is completly on the table, then all the upward force is on the table instead of the spring scale. the larger the force (N) the longer the arrows going up and down.
Mr. Finley pulled me on a cart in the hallway. There was an upward and downward force, but also a sideways force. This was un balanced situation. The prediction was the harder Mr. Finley pulls, the faster i get. The data is that the cart got faster. Mr. Finley got faster because the cart got faster (applies the same amount of force). Also the cart kept getting faster because there is no opposite force to hold back the carts forward movement. If there is nothing to stop something moving sideways, and something is still applying force, then it will just keep getting faster.

JC