A 2 kg block iks placed over a 4 kg block and both are plced on a smooth horizontal surfae. The coefficient of friction between the blocks is 0.20. Find theacceleration of the two blocks if a horizontal force os 12 N is applied to a. the upper block, b. the lower block. Take `g=10 m/s^2`.

Explanation

To solve the problem, we need to analyze two scenarios where a force is applied to either the upper block or the lower block. We will calculate the accelerations in both cases step by step.

### Given Data:
- Mass of upper block (m1) = 2 kg
- Mass of lower block (m2) = 4 kg
- Coefficient of friction (μ) = 0.20
- Applied force (F) = 12 N
- Acceleration due to gravity (g) = 10 m/s²
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