A tiny sphere of mass 850 microg and charge -280 nc is

Question

Solve the all parts of given question:

Question: A tiny sphere of mass 8.50 µg and charge -2.80 nC is initially at a distance of 1.74 µm from a fixed charge of +9.01 nC.

Part I: If the 8.50-µg sphere is released from rest, find its kinetic energy when it is 0.500 µm from the fixed charge.

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Part II: If the 8.50-µg sphere is released from rest, find its speed when it is 0.500 µm from the fixed charge.

__m/s

Please explain clearly with details so that I can follow.