Physics:
1. An object of mass m falls from height h and has a charge q. There is an electric field, E, acting upwardly on the ball. Find an equation for the velocity of the ball at the time it hits the floor.
Step 1) Fnet=Felectric + Fgravity
Step 2) Fgravity=mg Felectric=Eq
Step 3) Fnet=mg + Eq
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