Ms. Frizzle's Commute
Luckily, the bus that came was an express bus and only stopped once between her house and the Union Square train station. The stop was 4 kilometers from where she got on, and the bus took 8 minutes to get there. Lots of people needed to get on and off, so it was stopped for 5 minutes. Then it took another 10 minutes to go the remaining 5 kilometers to Union Square.
In Union Square, Ms. Frizzle waited on the platform for 15 minutes for her train. When it finally came, she got on and read a book during the train ride. The train stopped three times during the trip. Each time, it stopped for 3 minutes to let people on. Each stop was 5 kilometers after the previous stop, and the train took 5 minutes to get from one stop to the next.
Finally, the subway arrived at her stop in the Bronx, and Ms. Frizzle got off. She decided to take a cab to work. The cab took 12 minutes to drive her the remaining 4 kilometers to school.
Your task: I will hand out graph paper for question 1. Answer the remaining questions on looseleaf in complete sentences. Show your work whenever possible.
1. Make a distance-time graph showing Ms. Frizzle's commute to work.
2. What form of transportation went the fastest (walking, bus, train, cab)? Show your work.
3. What was Ms. Frizzle's average speed for this trip?
4. When was Ms. Frizzle's instantaneous speed the fastest?
5. When was her instantaneous speed the slowest (don’t count times when she was not moving!).
6. Did Ms. Frizzle arrive at school on time?
Edible Race Cars: I wish I'd found this before we started this unit!