A Ball's Motion: Understanding Vertical and Horizontal Velocities

What statement about the motion of a ball kicked at an angle, 0, from horizontal with an initial velocity of v is true? The statement that is true about the motion of the ball in this scenario is: The ball's vertical velocity is zero at the highest point in the trajectory, while its horizontal velocity remains constant.

Understanding Ball's Motion at an Angle

The ball's vertical velocity is zero at the highest point in the trajectory

When a ball is kicked at an angle from horizontal with an initial velocity, the motion of the ball can be broken down into vertical and horizontal components. At the highest point in the trajectory, the ball momentarily stops moving upwards in the vertical direction before starting to fall back down. This means that the vertical velocity of the ball is zero at this point.

Horizontal velocity remains constant

While the vertical velocity changes throughout the trajectory due to the force of gravity, the horizontal velocity of the ball remains constant. The only force acting on the horizontal motion of the ball is the initial velocity it was kicked with, which keeps it moving at a consistent speed.

Horizontal velocity does not change at the rate of 9.8 meters/second²

It is important to note that the acceleration due to gravity, which is 9.8 meters/second², only affects the vertical motion of the ball, not the horizontal motion. Therefore, the statement that the ball's horizontal velocity changes at the rate of 9.8 meters/second² is inaccurate.

By understanding the principles of projectile motion and how vertical and horizontal velocities interact, we can better comprehend the trajectory of objects in motion. To delve deeper into this topic, you can explore Projectile Motion in more detail.

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