A body is projected with an initial velocity of 58.8 m/s at angle 60° with the vertical. The vertical component of velocity after 2 sec is

Explanation

To find the vertical component of velocity after 2 seconds for a body projected with an initial velocity of 58.8 m/s at an angle of 60° with the vertical, we can follow these steps:

### Step 1: Identify the initial vertical component of velocity
The initial velocity \( u \) is given as 58.8 m/s and the angle \( \theta \) is 60° with the vertical. The vertical component of the initial velocity can be calculated using the sine function:
\[ u_y = u \cdot \cos(\theta) \]
Since the angle is measured from the vertical, we use cosine:
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