Easy question; random or systematic error
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Easy question; random or systematic error

[From: ] [author: ] [Date: 12-10-17] [Hit: ]
......
a) The blob of clay started to become dry and brittle after multiple runs and the carts never perfectly stuck together after the collision.

b) Friction

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both systematic. you know what they are. a) can be fixed by redesigning the experiment to use a different material.
b) you can measure and account for friction. It always causes the cart to slow so it systematically bias your results.
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