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 ▸How does Einsteins explanation of the photons explain the effect of varying intensity of light in the Photoelectric effect?
Where does the simple harmonic motion equation come from and what does it mean?
I have an infinite number of glass blocks stacked side by side. The first block has refractive index n1, the second n2 and so on, such that n1<n2...<n(infinity). I shine a light on the stack, what angle does the ray make to the normal on the last block?
Why does gravitational potential energy have a negative value?