What happens when objects collide? How can we design a crash protection device to absorb enough energy during a car crash to save lives?
- Do Now– Get out your science notebook and open to p.61. Look over your observations of the two collisions in the T-chart. Turn to your partner and discuss what could be causing the differences that you observed between the two crashes.
- Field Assignment- Performing Crash Tests- Create two line graphs on graph paper from the velocity vs time data for the two car crashes in the videos. Label the x-axis as “time” and the y-axis as “velocity.” Use the graphs to describe what each car is doing during the particular time intervals and record on your graph paper. On the handout, calculate the acceleration for each car during those time intervals. Using the graph, determine the time of impact for each car. Calculate the momentum of each car at the moment of impact assuming both cars have a mass of 1,500 kg.
- Putting Pieces Together– Take stock- Identify and consolidate ideas you have figured out across your investigations about motion. Put pieces together- Come to a consensus on how the pieces explain what happens when objects collide. Develop a public representation of how the pieces fit together.