Answer:
11.025 meters
Explanation:
The gravity’s acceleration on the surface of earth is approximately 9.8m/s
If it took 3 s to go up and come back, that means it took (1/2) × 3 to go from his hand to its highest point, and that amount of time again (1.5 seconds) to go back down to his hand.
This means the ball accelerated from Vi (initial Velocity) to 0 in 1.5 s
To find g in 1.5 i.e speed =
1.5 × 9.8 m/s = 14.7 m/s.
To find the height the ball reached=
We will use d = rt for this. Distance = Rate × Time
Since, it went 14.7 m/s at the start, and 0 m/s at the top, so the average speed of the ball going upward was (0+14.7)/2 = 7.35 m/s
7.35 m/s was the average speed = rate.
Time was 1.5 seconds, so we multiply.
7.35 m/s × 1.5seconds = 11.025 meters
