Asked by sally
Jamie rides a Ferris wheel for five minutes. The diameter of the wheel is 10 meters,and its center is 6 meters above the ground. Each revolution of the wheel takes 30 seconds. Being more than 9 meters above the ground causes Jamie to suffer an anxiety attack. For
how many seconds does Jamie feel uncomfortable?
how many seconds does Jamie feel uncomfortable?
Answers
Answered by
bobpursley
draw a triangle from the diameter horizontal, up from the horizontal 3m to intersect the circle, then the hyp is the radius back to the center.
h=3m so 3/5 = sinTheta theta= 36.8deg
So the person is below nine meters then the bottom 180deg, and the top each side 36.8 deg, or a total of 253.7 deg, or
253.7/360 percent of the time.
time above= 5min*253.7/360
h=3m so 3/5 = sinTheta theta= 36.8deg
So the person is below nine meters then the bottom 180deg, and the top each side 36.8 deg, or a total of 253.7 deg, or
253.7/360 percent of the time.
time above= 5min*253.7/360
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