A particle mass 1 kg is moving along a straight line `y=x+4`. Both x and y are in metres. Velocity of the particle is `2m//s`. Find the magnitude of angular momentum of the particle about origin.

Explanation

To find the magnitude of the angular momentum of a particle moving along the line \( y = x + 4 \) about the origin, we can follow these steps:

### Step 1: Identify the position of the particle
The line \( y = x + 4 \) indicates that for any value of \( x \), the corresponding \( y \) can be calculated. We can choose a specific point on this line. For simplicity, let's choose \( x = 0 \):
\[ y = 0 + 4 = 4 \]
Thus, at \( x = 0 \), the position of the particle is \( (0, 4) \).
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