The number of revolutions will be equal to the distance of the trip divided by the circumference of the wheel. We're already given the trip distance, and the circumference can be worked out from the radius we're given. Recall: the circumference of a circle is equal to pi multiplied by twice it's radius; or more formally:
c = 2Ï€r
In this case, r is equal to 28cm, so we can say:
c = 2Ï€28cm
≈ 2 × 3.14159265 × 28cm
≈ 175.929cm
Now we can take the distance of the trip, 3km, and divide it by the circumference of the wheel, 175.929 centimeters. That will give us the number of revolutions for the wheel:
R ≈ 3km / 175.929cm
We will of course have to convert the units first. There are one hundred thousand centimeters in a kilometer, so we can say:
R ≈ 300000cm / 175.929cm
∴ R ≈ 1705.232
That gives us the number of revolutions that would be required, but the question asks how many complete revolutions are needed. This means the last 0.232 revolutions would not be part of our final answer. Instead we can say:
R = 1705
So the wheel must do one thousand, seven hundred and five complete revolutions for a three kilometer journey.
For A+ =31.40 2x(22/7)x1x5 =31.43 ft.
In each revolution, the wheel would advance 2 x pi x radius. Multiply this by the number of revolutions.
Distance is number of revolutions times circumference. So divide the distance by the revolutions to get the circumference. Then divide the circumference by pi to get the diameter, and divide that by 2 to get the radius.
My answer is 12
30. The radius is not relevant. Each roll is one revolution.
5000 revolutions in 11000m = 1 revolution every 2.2m Circumference is 2.2m Circumference is diameter times pi 2.2m dividied by pi divided by 2 (to go from diameter to radius) = 35.014cm
Find how far one revolution goes - this is the circumference of the wheel; from this the radius can be calculated: 1000 revolutions = 628m 1 revolution = 0.628m =62.8cm Circumference = 2{pi}radius (pi ~= 3.14) radius = circumference / 2{pi} ~= 62.8cm / (2 x 3.14) = 62.8cm / 6.28 = 10cm
One formula is: centripetal force = speed2 / radius. Solve it for speed, then convert that to revolutions per second.One formula is: centripetal force = speed2 / radius. Solve it for speed, then convert that to revolutions per second.One formula is: centripetal force = speed2 / radius. Solve it for speed, then convert that to revolutions per second.One formula is: centripetal force = speed2 / radius. Solve it for speed, then convert that to revolutions per second.
For A+ =31.40 2x(22/7)x1x5 =31.43 ft.
In each revolution, the wheel would advance 2 x pi x radius. Multiply this by the number of revolutions.
Distance is number of revolutions times circumference. So divide the distance by the revolutions to get the circumference. Then divide the circumference by pi to get the diameter, and divide that by 2 to get the radius.
The outer radius is 20/2 = 10 inches
3328.4 inches
That depends on the radius of the wheel making the revolutions.
My answer is 12
Radius of the wheel: 24/2 = 12 inches
246.74 or the rounded answer is 247