select the correct answer. which statement is true for the highest point of a projectile trajectory? a. the…

Explanation:

Step1: Analyze projectile motion

In projectile motion, the horizontal - direction has no acceleration ($a_x = 0$) and the vertical - direction has an acceleration $a_y=-g$ (where $g$ is the acceleration due to gravity).

Step2: Consider velocity components at highest point

The horizontal component of velocity $v_x$ remains constant throughout the motion because there is no horizontal acceleration, i.e., $v_x = v_{0x}$ (initial horizontal velocity). At the highest point of the projectile's trajectory, the vertical motion changes direction. The vertical velocity $v_y$ decreases as the projectile moves up and becomes zero at the highest point before it starts to fall downwards. The resultant velocity $v=\sqrt{v_x^{2}+v_y^{2}}$, and since $v_x\neq0$ and $v_y = 0$ at the highest point, $v\neq0$.

Answer:

B. The vertical component of velocity is zero.