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# Machines in motion Lab

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### Machines in motion Lab

1. 1. <ul><li>Machines in Motion </li></ul><ul><li>What makes a machine move? A force does. </li></ul><ul><li>Problem: </li></ul><ul><li>Part 1) How does the amount of force affect the speed ? </li></ul><ul><li>Part 2) How does the mass of the car affect the speed ? </li></ul><ul><li>Variables: </li></ul><ul><li>Part 1: </li></ul><ul><li>Independent: __________ </li></ul><ul><li>Dependent: ___________ </li></ul><ul><li>Part 2: </li></ul><ul><li>Independent: __________ </li></ul><ul><li>Dependent: ____________ </li></ul><ul><li>Materials: </li></ul><ul><li>meter stick </li></ul><ul><li>Newton scale </li></ul><ul><li>Trolley and “launching ramp” </li></ul><ul><li>Strong rubber band </li></ul>2 N 2 N
2. 2. HYPOTHESES <ul><li>PART 1 : How does the amount of force affect the speed ? </li></ul><ul><ul><li>If the ____(IV)_____ is increased, </li></ul></ul><ul><ul><li>Then the __(DV)__ will _(choose one)_ </li></ul></ul><ul><ul><li>Because __(use sci knowledge to explain)__ </li></ul></ul><ul><li>PART 2 : How does the mass of the car affect the speed ? </li></ul><ul><ul><li>Follow the same format as above </li></ul></ul>
3. 3. <ul><li>PROCEDURE: </li></ul><ul><li>Pull back the rubber band to 2N and launch the car. </li></ul><ul><li>Mark the distance with a piece of tape (this is your “finish line”). </li></ul><ul><li>Measure and record this as your distance in your data table. </li></ul><ul><li>Now pull the rubber band back to the 2N mark and launch the car again. </li></ul><ul><li>Measure the time it takes the car to reach the finish line and record it in the table. Repeat this 2 more times for a total of 3 trials . </li></ul><ul><li>Repeat steps #4 & #5 for 4N, 6N, and 8N . </li></ul><ul><li>Repeat the whole lab again with a heavier car . </li></ul>Finish line 2 N 2 N
4. 6. Graphing Results
5. 7. The Relationship Between _ both IV’s__ and the _ DV _ units units (Heavy) (Light)
6. 8. <ul><li>Conclusion/Summary: </li></ul><ul><li>Is your hypothesis for PART 1 right or wrong? Explain. </li></ul><ul><ul><li>- Restate your hypothesis </li></ul></ul><ul><ul><li>-State whether right or wrong </li></ul></ul><ul><ul><li>-Use data (#’s) to support why hypothesis is right or wrong </li></ul></ul><ul><li>2. Is your hypothesis for PART 2 right or wrong? Explain. (follow same steps as above) </li></ul><ul><li>3. Identify Sources of Error AND how to improve them. </li></ul>