A car driver going at speed `v` suddenly finds a wide wall at a distance `r` . Should he apply breakes or turn the car in a circle of radius `r` to avoid hitting the wall.

A bullet going with speed 350 m/s enters in a concrete wall and penetrates a distance of 5 cm before coming to rest . Find the deceleration ?

A body is moving with a constant speed v in a circle of radius r. its angualr acceleration is :

A body moving with a constant speed v in a circle of radius r. its angular acceleration is :

Consider the situation of the previous problem. A particle having charge q and mass m is projected from the point Q in a direction going into the plane of the diagram. It is found to describe a circle of radius r between the two plates. Find the speed of the charged particle.

A race car driver is racing at 20^(th) km. If his speed never exceeds 150 km/hr, what is the maximum distance he can cover in the next two hours.