A Ferris wheel has a radius of 25 meters and completes one revolution in 4 minutes. Correct to the nearest tenth of a meter per second, what is the average speed of someone in a car at the rim of the wheel?
these were the possible answers that were given....
0.5 m/sec
0.6 m/sec
0.7 m/sec
0.8 m/sec
0.9 m/sec
1.0 m/sec
or none of these
2007-08-05 06:45:18 · 6 answers · asked by chris 2 in Science & Mathematics ➔ Mathematics
Circ = pi * D, = 157meters
157 / 4 = 39.3 m/min = 0.6545m/sec
0.7 m/sec rounded
2007-08-05 06:53:52 · answer #1 · answered by goblin 4 · 1⤊ 0⤋
Radius = 25 metres
Circumference = diameter * pi
Circumference = 2 * 25 * 3.14159 =157.0795 metres
1 revolution takes 4 minutes.
As the answer required is in metres per second we need to translate the revolution time in seconds.
1 revolution takes 4 minutes = 4 * 60 = 240 seconds.
Therefore each second the wheel will travel a distance of
157.0795 / 240 = 0.6544979 metres per second.
Answer = 0.7m / sec
2007-08-05 07:06:36 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Find the Circumference.
C = 2r3.14
C =157m
Convert measurements
4 min =240 sec
Find the speed.
average speed = 157m /240 sec
average speed = 0.65 m/sec
Round to the nearest tenth.
0.65 m/sec 0.7 m/sec
My Answer is 0.7m/sec.
2007-08-05 07:02:32 · answer #3 · answered by DesTynee J. 2 · 0⤊ 0⤋
Speed is distance over time, so
2Ï(25)/4 = 25Ï/2 m/min =
25Ï/2 m / 60 s = 5Ï/24 m/s =
0.654498 m/s â 0.7 m/s
2007-08-05 06:54:56 · answer #4 · answered by Philo 7 · 1⤊ 0⤋
permeter of ferris wheel=2*pi/r=2*22/7*25=157 m
average speed =0.7m/second
2007-08-05 06:52:52 · answer #5 · answered by Anonymous · 1⤊ 0⤋
between 0.9 and 1.0 m per second i think
good luck
xx
vici
2007-08-05 06:49:43 · answer #6 · answered by vici 4 · 0⤊ 0⤋