1) The document describes an experiment to investigate how force and mass affect the speed of a toy car. It outlines the variables, hypotheses, procedure, data collection, and analysis steps. 2) The experiment tests how increasing force affects speed, and how increasing mass affects speed. Force is the independent variable for the first test and mass is the independent variable for the second. 3) The procedure involves launching toy cars from a ramp using rubber bands of increasing strength to provide different forces, and measuring the time and distance to determine the effect on speed.

1. Machines in Motion What makes a machine move? A force does. Problem: Part 1) How does the amount of force affect the speed ? Part 2) How does the mass of the car affect the speed ? Variables: Part 1: Independent: __________ Dependent: ___________ Part 2: Independent: __________ Dependent: ____________ Materials: meter stick Newton scale Trolley and “launching ramp” Strong rubber band 2 N 2 N

2. HYPOTHESES PART 1 : How does the amount of force affect the speed ? If the ____(IV)_____ is increased, Then the __(DV)__ will _(choose one)_ Because __(use sci knowledge to explain)__ PART 2 : How does the mass of the car affect the speed ? Follow the same format as above

3. PROCEDURE: Pull back the rubber band to 2N and launch the car. Mark the distance with a piece of tape (this is your “finish line”). Measure and record this as your distance in your data table. Now pull the rubber band back to the 2N mark and launch the car again. 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 . Repeat steps #4 & #5 for 4N, 6N, and 8N . Repeat the whole lab again with a heavier car . Finish line 2 N 2 N

6. Graphing Results

7. The Relationship Between _ both IV’s__ and the _ DV _ units units (Heavy) (Light)

8. Conclusion/Summary: Is your hypothesis for PART 1 right or wrong? Explain. - Restate your hypothesis -State whether right or wrong -Use data (#’s) to support why hypothesis is right or wrong 2. Is your hypothesis for PART 2 right or wrong? Explain. (follow same steps as above) 3. Identify Sources of Error AND how to improve them.