What is the angular velocity of a car wheel which diameter is d = 15 mm if the car velocity is of 120 km/h?
First, we change the units of the datas:
v=120 km/h = 120 km/h x 1 h / 3600 s x 1000 m /1 km = 33.333 m / s
d=15 mm = 15x10-3 m
Using the formula of the angular velocity: w=v/r = 33.33 m/s / 15x10-3 m= 2222.22 rad/s
LA
Related Physics A Level answers
All answers ▸The speed of water moving through a turbine is 2.5 m/s. Show that the mass of water passing through an area of 500 metres squared in one second is about 1 x 10^6 kg (density of sea water = 1030 kg/m^3)
How and why does a geostationary satellite stay above the same point on the Earths surface?
what is the centripetal force?
Show that the radius of an orbit may be expressed as follows: R^3=((GM)/4*pi^2)T^2