Research question:
How does the motion related to force?
Steps:
Put a special track on the table and a car one it, making the resistance almost 0.
Set up a motion sensor at the end of the track to see the changing velocity.
Hang a group of weight on the car and use a pulley to change the force in to down award.
Set up a motion sensor at the end of the track to see the changing velocity.
Hang a group of weight on the car and use a pulley to change the force in to down award.
Experiment I
Experiment II
From different groups, we found out that the larger the domain is, the precise the result is.
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Independent variable: mass
dependent variable: acceleration Contant: net force ConclusionWith the increasing of the mass, the acceleration starts to decrease from a fast rate to a slow rate. It's basically in inverse ratio.
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