18. The magnitude of the acceleration of an object at the top of its path is equal to Mark only one oval. in vertical velocity it horizontal velocity 0m/s 9.8m/s/s 19. The vertical velocity of an object at the top of its path is equal to Mark only one oval. it vertical velocity it horizontal velocity 0m/s 9.8m/s/s 5 points

18. **The magnitude of the acceleration of an object at the top of its path is equal to 9.8m/s/s.**<br /><br />This refers to projectile motion. Even at the top of its path where the *vertical velocity* is momentarily zero, gravity continues to accelerate the object downwards at a constant rate of approximately 9.8 m/s².<br /><br />19. **The vertical velocity of an object at the top of its path is equal to 0m/s.**<br /><br />At the highest point in the trajectory of a projectile, the vertical velocity component becomes zero. The object momentarily stops moving upwards before it starts descending. The horizontal velocity, however, remains constant throughout the flight (ignoring air resistance).<br />