Question

Which of the following statements is/are true? The vertical velocity of a projectile at the apex of its trajectory is always zero. The horizontal velocity of a projectile at the apex of its trajectory is always zero. The vertical acceleration of a projectile at the apex of its trajectory is always zero. Both A) and C) are correct. Both B) and C) are correct.

Answer 1

The vertical velocity at the apex of a projectile's trajectory is zero, while the horizontal velocity remains constant. The vertical acceleration at the apex is also zero.

Step-by-step explanation:

In projectile motion, the vertical velocity of a projectile at the apex of its trajectory is always zero. This is because the object reaches its highest point in the vertical direction and starts to descend, so the vertical velocity changes from positive to zero and then to negative.

However, the horizontal velocity of a projectile at the apex of its trajectory is not always zero. The horizontal velocity remains constant throughout the entire trajectory, including at the apex.

The vertical acceleration of a projectile at the apex of its trajectory is always zero, just like its vertical velocity. This is because at the highest point, the object is momentarily at rest in the vertical direction, and therefore, there is no vertical acceleration acting on it.

So, the correct statement is that both A) and C) are correct.