To find the vertical velocity of an object thrown downwards, we need to consider the acceleration due to gravity (g), which is approximately 9.8 m/s².
Given: Initial velocity (u) = 25 m/s (thrown downwards) Time (t) = 2.0 s
The vertical velocity (v) can be calculated using the equation:
v = u + gt
Plugging in the values:
v = 25 m/s + (9.8 m/s²)(2.0 s) = 25 m/s + 19.6 m/s = 44.6 m/s
Therefore, the vertical velocity of the object thrown downwards at 25 m/s after 2.0 s is 44.6 m/s. Note that the positive sign indicates a downward direction in this case.