Answer:
3.4
Step-by-step explanation:
Answer: The circumference of a circle is equal to Pi π times the diameter d . Since the diameter d is equal to 2 times the radius r , the formula for circumference using radius is 2πr 2 π r .
Step-by-step explanation:
Answer:
1055.99 rad/min
Step-by-step explanation:
Given that,
The diameter of a bicycle, d = 24 inches
Radius, r = 12 inches
The bicycle is travelling at 12 mi/h.
We need to find the angular speed of the wheels in rad/min.
We know that,
1 mi/h = 0.0166667 mi/min
It means,
12 mi/h = 0.2 mi/min
Also,
12 inch = 0.000189394 miles
The angular speeds of the wheels is given by :
![v=r\omega\\\\\omega=\dfrac{v}{r}\\\\\omega=\dfrac{0.2}{0.000189394}\\\\\omega=1055.99\ rad/min](https://tex.z-dn.net/?f=v%3Dr%5Comega%5C%5C%5C%5C%5Comega%3D%5Cdfrac%7Bv%7D%7Br%7D%5C%5C%5C%5C%5Comega%3D%5Cdfrac%7B0.2%7D%7B0.000189394%7D%5C%5C%5C%5C%5Comega%3D1055.99%5C%20rad%2Fmin)
So, the angular speeds of the wheels is 1055.99 rad/min.