Directions for Set-Up
Before Pressing Go, which way do you think the cart will move? (None, Right, Left)
Why does the cart move that way?
What is the sum & direction of the forces?
(example: 70 Left)
Place 1 small blue guy on the very end of the left rope & 1 small red guy on the very end of the right rope
Before pressing Go, the cart will move to the right. This is because there is a greater net force acting on the cart in the right direction.
The cart moves to the right because the net force acting on it is greater in that direction. The net force is determined by adding up all the individual forces acting on the cart.
Place the medium blue guy on the very end of the left rope & 1 small red guy on the very end of the right rope
Place the big blue guy on the very end of the left rope & add all 4 of the red guys to the right rope
1 answer
The medium blue guy on the left rope adds to the force in the left direction, but it is still not enough to overcome the force of the big blue guy and the four red guys on the right rope.
The big blue guy on the left rope adds even more force in the left direction, but again, it is still not enough to overcome the force of the big blue guy and the four red guys on the right rope. The sum of the forces is still greater in the right direction, resulting in the cart moving to the right.