Two objects of equal mass rest on the opposite pans of an arm balance. Does the scale remain balance when it is accelerated up or down in a life ?

Explanation

To solve the problem of whether the scale remains balanced when it is accelerated up or down in a lift, we can analyze the forces acting on the two objects on the arm balance.

### Step-by-Step Solution:

1. **Understanding the Arm Balance**:
- An arm balance consists of two pans (or plates) that are suspended from a central pivot. When equal masses are placed on both sides, the balance is in equilibrium.

2. **Identifying the Forces**:
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