A 60 kg father and 20 kg child sit on opposite ends of a seesaw consisting of a board of length 4.0 m and negligible mass. The pivot can be placed anywhere between the father and the child. At what distance from the child should it be placed so that the seesaw is balanced when the father and child are stationary?

Explanation

To solve the problem of balancing the seesaw with a 60 kg father and a 20 kg child, we can follow these steps:

### Step 1: Understand the System
We have a seesaw of length 4.0 m with a father (60 kg) on one end and a child (20 kg) on the other end. We need to find the position of the pivot (fulcrum) such that the seesaw is balanced.

### Step 2: Define Variables
Let:
- \( x \) = distance from the child to the pivot
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