Question: The ball is released from rest when the thread makes an angle of 32 with the vertical. How fast is it moving when the thread

The ball is released from rest when the thread makes an angle of 32° with the vertical. How fast is it moving when the thread is vertical?

A ball with a net charge of +450 nC and mass 0.75 g is suspended from a thread of length 12 cm in a uniform electric field of 8.0 kV/m downward. Do not ignore gravity. The system acts like a pendulum but with a downward electric force added to the gravitational force.

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