On a dry road, the maximum safe speed for a vehicle moving on a curved road is 39km/hr. After heavy showers the maximum safe speed for the same road was 18 km/hr.What is the ratio of the co-efficient of friction for the dry road to wet road ?

At what maximum speed a racing car can travel through unbanked curve of radius 50m?The coefficient of friction between tyres of car and road surface is 0.5

The maximum speed that can be achieved without skidding by a car on a circular unbanked road of radius R and coefficient of static friction p is

Without changing the angle of banking, if we want to increase the maximum safe speed, with which a car can travel on the curved road by 10% then what much we should increase the radius of curvature of the road from 20m.

State the laws of friction. Obtain an expression for the best speed at which to take the curve on a banked road having friction.

Find the maximum velocity with which a driver must drive his car on a flat curved road of radius of curvature 150m and co-efficient of friction 0.6, to avoid skidding of his car.

A car of mass 750 kg has an engine which produces a constant power of 40 kW. If the resistance to motion assumed constant is 800 N, Find the maximum speed at which the car can travel on the road. Also find the acceleration when it is travelling at 25m/s.

A curve on a highway has a radius of 25m. If the width of the road is 5m and its outer edge is 0.5m higher than the inner edge, for what maximum speed is the curve banked ?