A fighter plane flying in the sky describes a vertical circle of radius 150 m when looping with a speed of 420 km/h . The weight of the pilot sitting inside it is 90 kg . With what force the pilot presses his seat when the plane is at the
(i) highest position of circle
(ii) lowest position of circle

Explanation

To solve the problem of the force exerted by the pilot on his seat at the highest and lowest positions of the vertical circle, we will follow these steps:

### Given Data:
- Radius of the circle, \( r = 150 \, \text{m} \)
- Speed of the plane, \( v = 420 \, \text{km/h} \)
- Weight of the pilot, \( m = 90 \, \text{kg} \)

### Step 1: Convert Speed from km/h to m/s
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