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Newtons Third Law and Collision Safety Design
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Grade Level
Grade 6
6.49 Newtons Third Law and Collision Safety Design
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Which procedure best controls variables across trials?
A
Reuse the same foam bumper for all tests to keep things consistent.
B
Replace the foam bumper with a new, identical piece (or measure and reset its thickness) for each trial, keep speed and mass constant, and randomize trial order between bumper types.
C
Test the new bumper first every time because it’s the one you care about.
D
Increase speed as the foam compresses to keep it exciting.
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