Answer Happy

Part 2 Variables in your experiment: Manipulated (What are you changing in the lab?) - Responding (What is responding to the manipulated variable?) - Controlled (What stays the same? Find as many controlled variables as possible) - Data table: 2 Acceleration Net Force System Cart Time (5) Average Mass +added on the (cm/s) Distance Time system Mass M-mami Traveled Trial 2. d Trial Trial d(m) (N) t(s) a mi (Kg) 1 2 3 Cart+0.5 Conclusion and Analysis: 6) In general, as you increased the mass of the cart, what happened to the cart's acceleration? 7) Compare your data sets: as you double or triple the cart mass, how much does acceleration change? Show with math, words or pictures what you think the relationship is between force and acceleration. Justify your answer with data from the table. 34

8) What is one controlled variable did you not consider or monitor well enough? What effect did it have, and how might you reduce its effect? 9) Plot an acceleration vs (1/cart mass) graph to attach with your report 10) What is the significance of the slope of this graph? Extension in your report Give an example of how the relationship between mass and acceleration might affect YOU. (Examples: effort required to do something. limits on acceleration, how to control an object's motion better...) 11) Combine your results from both parts to come up with an equation linking force, acceleration and mass. 12) Kari is pulling a bookcase across her bedroom floor. What are the three reasons that she might find it hard to accelerate the bookcase? (Hints: link to this lab as well as Newton's 1" law) 35