Which ball, after being thrown upward, has the highest speed after one second?

To understand which ball has the highest speed after one second of being thrown upward, it is important to consider the effects of gravity on the motion of the balls. When an object is thrown upward, it initially moves against the gravitational force, which decelerates it until it reaches its peak height, after which it starts to fall back down.

In the case of the three balls, if they are all thrown upward with different initial velocities, the ball with the highest initial speed will have the greatest speed after one second. Importantly, all of the balls experience gravitational acceleration, which acts downwards at approximately (9.81 , \text{m/s}^2). Therefore, while they may decelerate as they ascend, the initial speed at which each ball was thrown plays a crucial role in determining its speed after one second.

If the question indicates that all balls experience the same gravitational force and are thrown for the same duration, then the ball with the greatest initial velocity would indeed have the highest speed after one second, since they all would be subject to the same gravitational deceleration over that time.

If the conclusion is to state that all have the same speed after one second, it implies that they are thrown in such a way that