Driving SCIENCE STEM Activity 19 Back to the Drawing Board

Reviewing Data Qualitative Not expressed in numbers Quantitative Expressed in numbers Which types of data has your team collected?

Reviewing Momentum Which of the following statements are true? Explain your reasoning. p = m v Doubling mass will double momentum. Momentum is directly proportional to an object’s velocity. Doubling velocity will double momentum. An object has a large momentum if both its mass and velocity are large. Mass and velocity are equally important in determining momentum. Momentum is directly proportional to an object’s mass.

Making Revisions Before working on your revisions, make a plan with your team. How can your car’s performance on the ramp be improved without sacrificing safety features? How can your car’s momentum be increased without sacrificing safety features? How can your safety features be improved?

Collecting Data In your notebook: Record the dimensions of your revised prototype. Record the estimated momentum of your revised prototype. Describe the performance on the ramp of your revised prototype. Describe the performance of your “egg”.

Reflection What statements can be made comparing your revised car to your first model? Why do you think your egg will survive a head- on crash?

Thanks to PDI 2 partners who sponsored the development of this activity and provided professional development support: American Honda Foundation DuPont CU-ICAR Safety-Kleen, EcoPower Fluor United States Conference of Mayors Thanks to race track partners who provided support for teachers: Darlington Raceway, Daytona International Speedway, Dover International Speedway, Martinsville Speedway, and Richmond International Raceway Copyright © 2015 Clemson University, Clemson, South Carolina (SC).