Maharashtra Board Solutions for Chapter: Rotational Dynamics, Exercise 2: Use your brain power

We have mentioned about static friction between road and the tyres. Why is it static? What about the kinetic friction between road and the tyres?

What do you do if your vehicle is trapped on a slippery or a sandy road? What is the physics involved? 

As a civil engineer, you are given contract to construct a curved road in a ghat. In order to obtain the banking angle $\mathrm{\theta }$, you need to decide the speed limit. How will you decide the values of speed v and radius r?

 If friction is zero, can a vehicle move on the road? Why are we not considering the friction in deriving the expression for the banking angle? 

What about the kinetic friction between the road and the tyres? 

What is expected to happen if one travels fast over a speed breaker? Why? 

How does the normal force on a concave suspension bridge change when a vehicle is travelling on it with constant speed? 

As a civil engineer, you are given contract to construct a curved road in a ghat. In order to obtain the banking angle $\theta$, you need to decide the speed limit. How will you decide the values of speed v and radius r?