A system consisting of two masses connected by a massless rod lies along the z-axis. A 9 kg mass is at a distance z =5 m while a 11 kg mass is at a distance 9m. The z coordinate and x-coordinate of the center of mass is (in m )

Options

A. `5,4`
B. `72,7.2`
C. `7.2,0`
D. `2,3`

Explanation

To find the center of mass of the system consisting of two masses connected by a massless rod along the z-axis, we will calculate both the z-coordinate and the x-coordinate of the center of mass.

### Step-by-Step Solution:

1. **Identify the Given Values**:
- Mass \( m_1 = 9 \, \text{kg} \) at position \( z_1 = 5 \, \text{m} \)
- Mass \( m_2 = 11 \, \text{kg} \) at position \( z_2 = 9 \, \text{m} \)

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