The time taken for the shoe to reach the ground is 8.1 seconds.
The time taken for the shoe to reach the ground is known as the time of motion of the shoe.
The value of the time of motion of the shoe is calculate using the following kinematic equation.
h = vt + ¹/₂gt²
where;
The initial vertical velocity of the shoe = 0
The new equation becomes;
h = 0 + ¹/₂gt²
t = √(2h/g)
t = √(2 x 321 / 9.8)
t = 8.1 seconds
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