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You just worked through a basic rotational dynamics lab. Here, the pendulum does not really move...

You just worked through a basic rotational dynamics lab. Here, the pendulum does not really move along a straight line. It has rotational energy as well as kinetic energy. Discuss potential sources of error in the momentum of the projectile due to any rotation.
Science   Advanced-Physics   
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The pendulum is not really a simple pendulum i.e. a point mass on a massless rod so, a systematic error is introduced. Rotational inertia of the pendulum is ignored during this experiment. Doing so resulted in the actual value of velocity of the ball being slower than the value we calculated during the experiment?. Friction is also an soure of error. Friction is slowing the pendulum which means that actual momentum of the projectile is less than we calculated in the experiment.

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