The wheel on a car has a radius of 14in and is driven 35mi/h, the wheels turn at an approximate rate of 420 rpm.Show how to obtain this rate of turn.
No, I always keep mine on low because I don't like it to be up too high.
I Know one Burned a Relative very seriously, although many Years ago!!
Well, it doesn't surprise me. When I was a kid, I washed my Barbie doll's hair and put the blow dryer to it, on High and it melted her hair to her plastic scalp. Needless to say, I was utterly heartbroken :o(
The circumference of a wheel is (28/0.3183)/12 7.3306ft 35mph 184800ft/hr 3080ft/min Number of wheel revolutions 3080/7.330 419.85/min QED
Assuming the wheel is rigid and does not deform under speed Speed of car 35 mph Radius of wheel 14 in To move down the road the wheels rotate, so the speed of car is to the circumference of the wheels * speed of turning 35 mph Wheel circumf * RPM 35 miles/hr 2 * Pi * 14 in * 1 ft/12in * 1 mile/5280 ft * Rev/min * 60 min/hr 35 miles/hr 0.083 miles/rev * rev/hr 420 RPM
