The length of a pendulum that makes one full swing in 2.2 seconds is; 4 ft
We are given the formula for the period of a pendulum as;
T = 2π√(L/g)
where;
L is length
g is acceleration due to gravity = 32 ft/s²
Thus, at period of T = 2.2 secs, we have;
2.2 = 2π√(L/32)
2.2/2π = √(L/32)
(1.1/3.14)² = L/32
L = 32 * (1.1/3.14)²
L = 3.92 ft
Approximating to a whole number gives;
L = 4 ft
Read more about Pendulum equations at; https://brainly.com/question/26449711
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