Assume you are starting with the hanging mass back at 0.5 kg at the center of the ruler. Imagine that another object with unknown mass is added to the ruler at 20 cm. When the unknown object is placed on the ruler, the left force sensor reads 37.75 N and the right force sensor reads 12.45 N

3. Given the addition of the unknown object, what will be the new total force acting on the ruler? Why?

4. What is the total force acting up:____________________N.

5. What is the total force acting down:__________________N. How do you know?

6. What is the force downward on the ruler from its own weight and the weight of the hanging mass?____________________________ N.

7. What must be the weight of the unknown object?

8. Use equation 4 to determine the mass of the unknown object.