Electric field affecting a charged particle question

AI Thread Summary
The discussion focuses on understanding the behavior of a charged particle, specifically a virus, in an electric field created by oppositely charged parallel plates. The electric field strength is given as 2.00 × 10^5 N/C, with the bottom plate being negative. The virus has a mass of 1.00 × 10^-15 kg and a charge of -1.60 × 10^-19 C, and the question seeks to determine its velocity and position after 75.0 ms, while also considering gravitational effects. Participants suggest starting with the calculation of acceleration to incorporate the time aspect into the problem. The final position of the virus is noted as 6.24 cm after the specified time.
crispy_nine
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At the moment I'm trying to figure out charged particle in electric field behavior and there's a type of question that seems to be confusing me lots.
Ok, here's such a question that I'm not sure about:

A virus rests on the bottom plate of oppositely charged parallel plates in the
vacuum chamber of an electron microscope. The electric field strength between
the plates is 2.00 × 105 N/C, and the bottom plate is negative. If the virus has a
mass of 1.00 × 10–15 kg and suddenly acquires a charge of –1.60 × 10–19 C, what
are its velocity and position 75.0 ms later? Do not disregard gravity.
Answer: ( y = 6.24 cm )

I was trying to apply conservation of energy but I'm not sure how to involve the time aspect. I'd appreciate any insight. Thanks
 
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To find the time, start by finding the acceleration.
 

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