Ath'ty G . Click Clear Paths and select Atmosphere: None. Effect of Gravity . Turn off Show grid and Show paths. on a Projectile Acceleration is a change in velocity. As the ball moves through its trajectory. it undergoes a downward acceleration due to the force of gravity. To observe the effect of gravity on the golf ball. check Advanced features. The acceleration downward on an object on Earth is 9.80 ms? (more on this later). Hit a golf ball and show its path. Now. decrease the gravity to 4.0 mi's2 and swing. Next. increase the gravity to 13.0 mfs2 and swing. . Using the paths of the balls compare the effect of increasing and decreasing the gravity on the ball. Review Questions: 1. The speed of an object can be calculated with the formula: Speed (E) : distance (m) s time (5) If a golf ball travels a distance of 100 meters in 4.0 seconds. what is the speed of the ball? 2. Imagine a runner on a circular 400 meter track. She makes one complete lap in 60.0 seconds. What is the runners speed around the track? What is the runner's displacement around the track? Since the track is circular. what can you say about the runner's velocity? Speed: Displacement: Velocity: 3. A basketball player at the end of the game throws the ball directly high overhead after winning the game. What is the acceleration of the ball on the way upward? What is the acceleration of the ball on the way downward? What is the velocity of the ball at the very apex of the throw? Upward: Downward: Velocity at apex