Answer:
Hope this helps!
Step-by-step explanation:
The time elapsed before the cannon ball strikes the ground can be found by using the equation for kinematic vertical motion,
t = (2*d)/g
Where d is the vertical distance and g is the acceleration due to gravity (9.8 m/s^2).
t = (2*61)/9.8
t = 12.24 seconds
The time elapsed is 12.24 seconds, rounded to the nearest hundredth is 12.24 seconds.