Question

what is the vertical acceleration of the ball at point c?
a -9.8 m/s²
b 0 m/s²
c 9.8 m/s²
d 0 m/s

Explanation:

Step1: Analyze the motion of the ball

The ball is in projectile motion. In projectile motion, the only acceleration acting on the ball is the acceleration due to gravity.

Step2: Determine the value and direction of acceleration

The acceleration due to gravity \(g = 9.8\ m/s^{2}\) acts downward. In the coordinate system (assuming upward as positive), the vertical acceleration \(a_y=-g\).

Answer:

A. -9.8 m/s²