first, the student dragged a gear into place in the mechanism, wound, and released the spring. she observed

that as the gear rotates the car moves.

2. then, the student measured the diameter, in centimeters, of each gear using the ruler. her results are below:

physical science | calculating speed | lab report

3. next, the student used the meter stick to measure and mark a finish line 1 meter from the starting position of

the cart.

analysis (8 points)

1. what tool(s) were used to measure in this activity? what units were used? (2 points)

2. what units for speed were used in this activity? (2 points)3. was a tool used to measure speed? if yes, what tool was used? if no, how was speed determined? (2 points)

4. can you think of a situation in which an instrument measures and indicates speed? (2 points)

conclusion (8 points)

write a brief summary for each of the following questions.

5. what was the purpose of this experiment? (2 points)

6. how did you determine speed? include your measurements and calculations. (2 points)

7. look at the results of the data in the graph. which gear caused the car to go fastest? which version of the car

was slowest? (2 points)

8. does the answer to the previous question support or refute your hypothesis? (2 points)