trig
posted by ahnas .
A pendulum is 18 feet long. Its central angle is 44º. The pendulum makes one back and forth swing every 12 seconds. Each minute, the pendulum swings _____ feet. (Answer to the nearest foot.)

trig 
Steve
s = rθ = 18(44*pi/180) = 13.82ft in one arc
It makes 10 (5 back and forth) swings every minute.
Total travel: 138 ft 
Algebra 2 
Sabra
s=rØ r=18 Ø= (11π/45) radians
s=18(11π/45)
s≈13.82 ft/sec
60sec÷12sec= 5sec
5×2=10
10×13.82=138.2
The pendulum travels 138 feet each minute
Degrees to radians;
(44÷1) × (π÷180) = (11π÷45)
Respond to this Question
Similar Questions

math
The period T (time in seconds for one completecycle) of a simple pendulum is related to the length L(in feet) of the pendulum by the formula8T^2=pi^2L. If achild is on a swing with a 10foot chain, then how longdoes it take to complete … 
math
The formula T=2*pi*sqrt[L/g] gives the period of a pendulum of length l feet. The period P is the number of seconds it takes for the pendulum to swing back and forth once. Suppose we want a pendulum to complete three periods in 2 seconds. … 
math
The formula T=2*pi*sqrt[L/32] gives the period of a pendulum of length l feet. The period P is the number of seconds it takes for the pendulum to swing back and forth once. Suppose we want a pendulum to complete three periods in 2 … 
College Algebra
The period (the time required for one complete swing) of a simple pendulum varies directly as the square root of its length. If a pendulum 12 feet long has a period of 4 seconds, find the period of a pendulum 3 feet long. 
physics/science
If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? 
science/physics
If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? 
Math
The formula l=8t^2/pi^2 represents the swing of a pendulum. In this formula, l is the length of the pendulum, in feet, and t is the time, in seconds, it takes to swing back and forth once. Whst is the length of a pendulum that makes … 
Precalculus
Suppose a pendulum is meters long. The time, , in seconds that it takes to swing back and forth once is given by t=2.01 square root L . If a pendulum is 10.24 meters long, how long does it take to swing back and forth once? 
Algebra 2
The period of a pendulum is the time the pendulum takes to swing back and forth. The function L=0.81t^2 relates the length L in feet of a pendulum to the time t in seconds that it takes to swing back and forth. A convention center … 
Algebra
the function of y= 0.81t^2 relates the time t in seconds, that it takes a problem of length y, in feet, to swing back and forth one time. about how long would it take a 3 ft pendulum to swing back and forth one time?