Physics

To find the time it takes for the cannonball to hit the ground, we can use the following kinematic equation for vertical motion:



where:
h is the vertical displacement
is the initial vertical velocity,
a is the acceleration due to gravity, which is approximately 9.81 m/s²,
t is the time.

Given:
h = 39 m,
= 0 m/s (since the cannonball is horizontally launched),
a = 9.81 m/s².

We can rearrange the equation to solve for time (t):

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