Experiment 2

Hypothesis: The force is greater when moving fast then the force moving at an constant speed.

Material used: string 8", hall's cart, 200 gram mass, spring scale,

Procedure: 1. Cut a piece of string about 8" long. Tie one end tot eh front of the hall's cart and tie a loop in the free end.

2. Put the 200 gram(g) mass in the hall's cart.

3. Push the cart back and forth on the table and think about the problem statement.

4. Zero the spring scale and attach the hoook on the spring scale to the string loop on the cart.

5. Tug on the spring scale several times to start the cart moving from rest.

6. Now jerk on the spring scale several times to start the cart moving from rest.

7. Finally, pull the cart across a table or floor at a constant speed several times. Then pull the cart at a faster speed.

8. Analyze your results

Data: Our data show us an lot of information. When pull at an constand speed, the speed was .05 but pull at an fater speed the speed was 1.0. So we tug each one at an different time and got different results but the range was from .5 to 1.0.

Picture:

Conclusion: To keep an object moving it took more speed. Our hypothesis was correct and yes the experiment did use Newton's first law for body at rest.