In a crash test, two test dummies with a mass of 77 kg each are placed in the test vehicle. One dummy has a seatbelt while the other dummy does not have a seatbelt. The vehicle is placed on a track and run into a wall at 56 km/h. Upon impact, everything comes to a halt.

• Calculate the impulse for each dummy during the collision.
• The seatbelt brings the driver dummy safely to a halt whereas the passenger stops violently by hitting the dashboard and windshield. Draw a force vs time graph to demonstrate an example set of forces working on each dummy and show that the graphed impulse for each dummy matches the previous calculations.
• Describe why the graph for each dummy is different and how those differences show that the driver dummy stops safely and the passenger dummy does not stop safely.
• What two experimental parameters would you change to REDUCE the severity (damage) the dummies sustain, and explain how each change would impact the seriousness of the crash