Two masses 2 kg and 4 kg are connected at the two ends of light inextensible string passing over a frictionless pulley. If the masses are released, then find the acceleration of the masses and the tension in the string.

Explanation

To solve the problem, we need to find the acceleration of the two masses and the tension in the string connecting them. We have two masses: \( m_1 = 2 \, \text{kg} \) and \( m_2 = 4 \, \text{kg} \).

### Step 1: Identify the Forces
When the masses are released, the force acting on each mass due to gravity can be calculated as follows:
- For \( m_1 \) (2 kg), the weight \( W_1 = m_1 \cdot g = 2 \cdot 10 = 20 \, \text{N} \) (acting upwards).
- For \( m_2 \) (4 kg), the weight \( W_2 = m_2 \cdot g = 4 \cdot 10 = 40 \, \text{N} \) (acting downwards).

### Step 2: Apply Newton's Second Law
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