A rectangular tank of mass `m_(0)` and charge Q is placed over a smooth horizontal floor. A horizontal electric field E exist in the region. Rain drops are falling vertically in the tank at the constant rate of n drops per second. Mass of each drop is m. Find velocity of tank as function of time.

Explanation

To find the velocity of the tank as a function of time, we will follow a systematic approach.

### Step-by-Step Solution:

1. **Understanding the Problem**:
- We have a rectangular tank of mass \( m_0 \) and charge \( Q \).
- The tank is placed on a smooth horizontal floor.
- A horizontal electric field \( E \) is present.
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