1. What is the purpose of the lab, the importance of the topic, and the question you are trying to answer? 2. What is your hypothesis (or hypotheses) for this experiment?

3. What methods are you using to test this (or each) hypothesis?

Section II: Data and Observations
4. Locate the data and observations collected in your lab guide. What are the key results? How would you best summarize the data to relate your findings?

5. Do you have quantitative data (numerical results or calculations)? Do you have qualitative data (written observations and descriptions)? How can you organize this date for your report?

Section III: Analysis and Discussion

6. What do the key results indicate?

7. If you constructed graphs, what trends do they indicate in your data?

8. Were there any problems with the experiment or the methods? Did you have any surprising results?

Section IV: Conclusions

9. What do the results tell you about your hypothesis(es)?

10. How do the data support your claim above?

11. If you could repeat the experiment and make it better, what would you do differently and why?

The california mussel (mytilus californianus) attaches itself to a rock or other solid surface with a bundle of filaments known as the byssus. imagine that 15.0 j of work is done to stretch the distal end of the byssus. it releases 10.8 j of thermal energy as it relaxes. what is the resilience of the distal end of the byssus?

Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2. what is the value of the friction force on the box? 200 n 50 n 43 n 33 n

Wo dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).