Or
Option 2
Upwards as positive:
The ball is 18,4 m downwards.
Or
Downwards as positive:
The ball is 18,4 m downwards.
Or
Option 3
Upwards as positive:
The ball is 18,4 m downwards.
Or
Downwards as positive:
The ball is 18,4 m downwards.
Or
Option 4
Total time to return to starting point:
∴ time from reference point to ground:
The ball is 18,4 m downwards.