If we are considering upward direction as positive, vertical component of acceleration is -9.81 m/s².
Explanation:
A soccer ball is kicked with a velocity of 25 m/s at an angle of 45° above the horizontal.
Here we need to find vertical component of its acceleration as it travels along its trajectory.
Vertical component of acceleration is acceleration due to gravity.
That is vertical component is 9.81 m/s² downward.
If we are considering upward direction as positive, vertical component of acceleration is -9.81 m/s².