Answer:
μ =0.8
This is the coefficient for kinetic friction
Step-by-step explanation:
Given that
m = 2000 kg
r= 50 m
v= 20 m/s
When a car moves around a circular arc the it experience a radial force F
F= m v²/r
To avoid the slipping friction force must be equal to F
Friction force Fr= μ m g
Fr= F
μ m g= m v²/r
μ = v²/rg
By putting the values
( take g =10 m/s²)
μ =0.8
This is the coefficient for kinetic friction