CURVE NEGOTIATION

Yesterday, I was reading Hindu newspaper there is a science & tech area where every Thursday QUESTION CORNER will be asked and answer will be provided.This time the question is based on physics.So I want to share to my readers.Here is a question,Why is it difficult for a huge truck speeding at 50 km/hr to negotiate a curve rather than a motorcycle at the same speed although the radius of the banking is independent of mass?and this question also can also be put as How to avoid skidding? 
I know the answer a little bit but not clear.So I want to share the answer for you.I am a big fan of MOTO GP and I love the cornering of Marc Marques.So I have just attached a photo of his cornering to understand my question.Take a look at the answer also.

MARC MARQUES CORNERING

CENTRIPETAL FORCE-  Any motion in a curved path represents accelerated motion, and requires a force directed towards the center of curvature of the path.

CENTRIPETAL FORCE

SUPER-ELEVATION

Whenever a body is negotiating a curved path, an outward horizontal force known as Centripetal force acts on the body.

That is why when we travel in a bus or a train, we feel we are pushed out while traveling in a curved path.To counter-act this force,outer edge of the road or rail is raised slightly in relation to the inner edge or rail.

DIAGRAMMATIC REPRESENTATION

This is known as Super-elevation in case of road and cant in case of railway track. The lifted edge in the road makes thee vehicle to tilt in side i.e., towards the center of the curve because of which a component of the weight of the vehicle will be equal to W.sinθ where θ is the angle through which the outer edge or rail is lifted and acts against the Centripetal force and skidding of the vehicle is prevented.


 In case of a motorcycle, the rider tilts the bike unconsciously towards inside while running on a curved path.However, in case of a truck, it is not possible to do so except the vehicle is tilted slightly equal to the super-elevation in the road.

This makes a large four-wheeled vehicle difficult to negotiate a sharp curve at high speed.

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