To determine the velocity of the ball after 2 seconds, we need to consider the effects of gravity acting on the ball as it moves upward and then falls back down.
Assuming there is no air resistance, the acceleration due to gravity is approximately -9.8 m/s² (negative because it acts in the opposite direction to the ball's initial upward velocity).
To find the velocity at a given time, we can use the following kinematic equation:
v = u + at
where: v = final velocity u = initial velocity a = acceleration t = time
Given: u = 5 m/s (initial velocity) a = -9.8 m/s² (acceleration due to gravity) t = 2 s (time)
Using the equation, we can calculate the final velocity:
v = u + at v = 5 m/s + (-9.8 m/s²) * 2 s v = 5 m/s - 19.6 m/s v = -14.6 m/s
The velocity of the ball after 2 seconds is approximately -14.6 m/s. The negative sign indicates that the ball is moving downward.