2 A. Hook it to the cart and pull.

2 B. Use a bigger rubber band.

3 A. 1. One washer= 1 mass. 2 washers= 2 mass. Etc,

3 B. .25

3 C. Streched, because there was more weight.

3 D. Gravity!(:

3 E. Downward.

4.  What makes something heavy is how compact it is.

5.  Push something.

6. Force: A force that plls you, and makes other objects do another thing.. Ex; Gravity, Elastic force,etc.