What are the formulas of circular motion
Linear velocity v = s / T, angular velocity ω = radian / T, from the above, we can deduce the line velocity v = ω R, in addition to v = s / T, we can also deduce v = 2 π R / T (Note: t is period) = ω r = 2 π RN (Note: n represents speed, N and t can be mutually converted, the formula is t = 1 / N), π represents circumference
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- 1. It is known that the center angle of the circle is 40 degrees, the radius is 84.5, and the arc length is 53.059. How to calculate the chord length and chord height? What formula should be used?
- 2. It is known that the chord length of bow is 4.3m and 7m. How to calculate the circumference of bow? Please write the formula and explanation,
- 3. How to calculate the arc length and radius when the chord length and arch height are known
- 4. Arc length, chord length and arch height are two of them. How to calculate radius? I just want to ask which formula is used. The answer is detailed and easy to understand. By the way, it's a question about the height. It's better to list the three one by one, such as how to calculate the arc length and chord length? How to calculate the arc length and arch height? Or how to calculate the chord length and arch height
- 5. Given that the arc length of a bow is C and the chord length is l, how to find its area? The key of the problem is to find the arc radius and the corresponding angle 2 α, R = L / 2Sin α, (α is half angle) C=R*2α, The results show that csin α = l α The problem is how to find this half angle α, except that McLaughlin formula takes the first three terms (SiNx = x-x ^ 3 / 3! + x ^ 5 / 5! - x ^ 7 / 7! +...) Besides the approximate value, is there an exact solution It's no good to simplify the double integral with the axis coordinate, and finally get the differential equation
- 6. Given the arc length, chord height, how to find the radius or chord length?
- 7. Known arc length 8.8 chord length 6.6 radius
- 8. The arcuate area formula can calculate the arcuate area when the chord length and height are known 1. Chord length 8.5, height 0.075, arch area? 2, chord length 8.5, height 0.095, arch area? 2? 3. Chord length 11.5, height 0.075, arcuate area? 4, chord length 11.5, height 0.095, arcuate area?
- 9. A fan, chord length 2.8 meters, arch height 0.415 meters, how much is the arc length?
- 10. As shown in the figure, the radius of the sector is 12 cm and the perimeter is 50 cm Where does half come from
- 11. What are all the formulas for circular motion
- 12. The center angle of the sector circle is 90 degrees. What is R + L divided by L?
- 13. If the radius is R and the square sector area is s, then the square of n is ()
- 14. Is r squared in S = (1 / 2) LR
- 15. Why is the arc formula L = n π R / 180? I can't understand why n should be multiplied by π R. isn't 2 π R △ 360 ° multiplied by the number of radians to get the arc length?
- 16. The proof of the formula of sector area! Let a sector radius be r and arc length be l, then the sector area s = 1 / 2lr. Why? Proof of the formula of sector area! Let a sector radius be r and arc length be l, then the sector area s = 1 / 2lr. Why? Proof!
- 17. High school mathematics radian system If 1 / 2 π is changed into angle system, some people think it's the multiplication of 1 / 2 radians of π radians, right
- 18. If the surface area of a cone is 9 and its side view is a semicircle, the diameter of the bottom of the cone can be calculated
- 19. If the surface area of a cone is known to be ACM ^ 2 and its side view is a sector with a center angle of 90 °, then the diameter of the bottom of the cone is
- 20. About commonly used area volume calculation formula, what good software is better, thank you for your advice! I want to calculate the volume of a standard elliptical head and determine its weight