Abird takes off at an angle of 30° to the ground with a velocity of 6 m/s. which expression shows the bird’s height after 2 seconds?

A vector at an angle of 30° can be thought as the sum of a horizontal and a vertical vector, which we will call .

In particular, you have

and moreover, we have

So, if we are only interested in the vertical component of the bird's flight, we have to consider a velocity of

This means that the bird rises with a constant speed of 3m/s, and thus his equation is

where is the height in meters and is the time in seconds