Raindrops of raidus 1mm and mass 4 mg are falling with a speed of 30 m/s on the head of a bald person. The drops splash on the head and come to rest. Assuming equivaletly that the drops cover a distance equal to their radii on the head, estimate the force exerted by the each drop on the head.

Explanation

To solve the problem of estimating the force exerted by each raindrop on the head of a bald person, we can follow these steps:

### Step 1: Identify the given data
- Radius of the raindrop, \( r = 1 \, \text{mm} = 1 \times 10^{-3} \, \text{m} \)
- Mass of the raindrop, \( m = 4 \, \text{mg} = 4 \times 10^{-6} \, \text{kg} \)
- Initial speed of the raindrop, \( u = 30 \, \text{m/s} \)
- Final speed of the raindrop when it comes to rest, \( v = 0 \, \text{m/s} \)

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