To determine the vertical velocity of an object thrown downwards after a certain time, we can use the equation for constant acceleration:
v = u + at
Where: v = final velocity u = initial velocity a = acceleration t = time
In this case, the object is thrown downwards, so the initial velocity (u) is 25 m/s, and the acceleration (a) due to gravity is approximately 9.8 m/s² (assuming no air resistance). The time (t) is given as 2.0 seconds.
Plugging these values into the equation, we can calculate the final velocity (v):
v = u + at v = 25 m/s + (9.8 m/s²)(2.0 s) v = 25 m/s + 19.6 m/s v = 44.6 m/s
Therefore, after 2.0 seconds, the vertical velocity of the object thrown downwards at 25 m/s is approximately 44.6 m/s.