Problem 4.1: Which is the correct free-body diagram?

Please wait for the animation to completely load.

A red block is pushed and moves as shown in the animation. In addition, a green block sits on the red block and moves as well. Restart.

  1. Which free-body diagram is correct? Give reasons why the other three diagrams are incorrect.
  2. How would your answer to (a) change if the blocks did not move?

Physlets were developed at Davidson College and converted from Java to JavaScript using the SwingJS system developed at St. Olaf College.

OSP Projects:
Open Source Physics - EJS Modeling
Physlet Physics
Physlet Quantum Physics
STP Book