Initiative:
In my opinion, the kinematics experiment provides a more accurate data than the pendulum does. One possibility involves the distance being measured. In the kinematics experiment,
a projectile is launched several meters from its source. The point of impact is then
measured from the launch point. The pendulum experiment however involves measuring
the difference in height of the center of mass of a pendulum. The
heights measured are really small, and are only a fraction of that length. One additional possibility is in the pendulum experiments, as we tried 5 times, the ball always bounced off and did not completely attached to the pendulum bob. This will cause the error in the total mass after the collision, thus, lead to an error in the final velocity.
In your error analysis in post 2, you noted that the device did not have the same velocity each time. How did you know? However, the error analysis in part 3 was good because you consider the size of the device, and how that can affect your data.
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