The correct option is 9 feet.
The height from the ground the white plank after the motion is 9 feet.
<h3>What is rotational motion?</h3>
Anything that spins or moves in a circular route is said to be in rotational motion. It's also referred to as angular motion and circular motion. The motion can be uniform (— in other words, the velocity v remains constant) and non-uniform, but it must be circular.
Now, according to the question;
The wheel's radius is 4 feet.
The height of a bottom of a wheel from the ground equals 1 foot.
π/3 radians is the angle where the wheel is rolled.
The following relationship describes the height of a revolving wheel.
f(t) = A·sin(B·t + C) + D
Where,
D = Mid line = 4 + 1 = 5 feet
B·t = π/3
C = 0
amplitude; A = 4
Substituting the values in the function;
f(t) = 4×sin(π/3) + 5 = 8.464 ft
f(t) = 9 (approx)
Therefore, the plank's height after the /3π/3 rotation motion = 9 ft.
To know more about the rotational motion, here
brainly.com/question/2136775
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