When one of the passengers was traveling on a city bus, his mobile phone slipped from his hands and that fell out of the bus through the window. This was observed by a school boy standing on the road. The path of the mobile phone observed by the school boy is ___________.

Options

A. circular
B. parabolic
C. linear
D. elliptical

Explanation

To determine the path of the mobile phone as observed by the schoolboy standing on the road, we can analyze the situation step by step.

### Step-by-Step Solution:

1. **Understanding the Scenario**: A passenger on a moving bus drops a mobile phone out of the window. The bus is moving forward while the phone falls.

2. **Initial Motion of the Phone**: When the phone slips from the passenger's hand, it retains the forward motion of the bus. This means that at the moment it leaves the bus, it has both a downward velocity (due to gravity) and a horizontal velocity (the same as the bus).

3. **Effect of Gravity**: Once the phone is outside the bus, it is acted upon by gravity, which pulls it downward. This means that while it is falling, it also continues to move forward at the same speed as the bus.

4. **Path of the Phone**: The combination of the downward motion (due to gravity) and the forward motion (due to the bus's speed) results in a curved path. This path is known as a parabolic trajectory.

5. **Conclusion**: Therefore, the path of the mobile phone observed by the schoolboy is **parabolic**.

### Final Answer:
The path of the mobile phone observed by the schoolboy is **parabolic**.

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