ω = 15 rev/min * 1min/60s * 2πrad/rev = ? rad/s
s = rθ = 12cm * ω rad/s * rs = ? cm
A wheel of a child's car revolves at 15 rpm.
a) What is the angular velocity of the wheel in radians per seconds?
b) A painted dot on the circumference of the wheel is 12 cm from the center of rotation of the wheel. How far does the dot travel in 5s?
3 answers
The radius of the wheel is 12 cm, therefore the circumference ( 2pi r) = 2 .3/14. 12 is equal to 75.39822369 . According to the previous section of the question, the wheel rotates 15 times per minute( 60 seconds); therefore 15 times 75.39822369 that is equal to 904.7786842 , is the the total distance the wheel revolves in 60 seconds. Through a simple equation , 94.2477961 cm is revolved in 5 seconds.
Given the radius of the tire is 1.2", what is the angular velocity of the wheels in RPM?
1 answer