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# Crashing Cars

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by

## Kristin Spencer

on 8 August 2014

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#### Transcript of Crashing Cars

Crashing Cars
Requirements
- Build the ramp structure to test a system that will have the most conserved momentum.
- Collect data in a data table.
Investigating variables and the conservation of momentum
NGSS
MS-PS3-2. Develop a model to describe that when the arrangement of objects interacting at a distance changes, different amounts of potential energy are stored in the system.

PS3.C: Relationship Between Energy and Forces
When two objects interact, each one exerts a force on the other that can cause energy to be transferred to or from the object. (MS-PS3-2)
The Challenge
Using a ramp, marble, and car, design an experiment to see how far a parked car travels after being hit by the marble.

Engineering Design Standards
MS-ETS1-3. Analyze data from tests to determine similarities and differences among several design solutions to identify the best characteristics of each that can be combined into a new solution to better meet the criteria for success.
MS-ETS1-4. Develop a model to generate data for iterative testing and modification of a proposed object, tool, or process such that an optimal design can be achieved.
Constraints
- Materials: mater sticks, marble, car, tape, timer
The Twist
You are part of a CSI team and get this update:
A car accident has occurred at the base of a hill. The driver of the car going down the hill claims that his car was not going fast enough to have caused the damage to the parked car at the bottom of the hill. The car at the bottom moved 70 cm! Recreate the accident scene and prove whether the man is innocent or guilty.
The Science
- Speed
- Momentum / Conservation of momentum
- Independent Variable
- Dependent Variable
The marble demonstrates the conservation of momentum as it hits the parked car at the bottom.

How does speed/angle of ramp/mass of marble affect the momentum/force that is transferred to the parked car?
The Math