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In (automotive) vehicle dynamics, slip is the relative motion between a tire and the road surface it is moving on. This slip can be generated either by the tire's rotational speed being greater or less than the free-rolling speed (usually described as percent slip), or by the tire's plane of rotation being at an angle to its direction of motion (referred to as slip angle).
A Formula Student car performing a skidpad test. (2009) A skidpad or skidpan [1] is a circular area of flat pavement used for various tests of a car's handling. The most common skidpad use is testing lateral acceleration, measured in meters per second squared (m/s 2) or the scaled unit g-force.
Braking distance refers to the distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop. It is primarily affected by the original speed of the vehicle and the coefficient of friction between the tires and the road surface, [Note 1] and negligibly by the tires' rolling resistance and vehicle's air drag.
Slip ratio is a means of calculating and expressing the slipping behavior of the wheel of an automobile.It is of fundamental importance in the field of vehicle dynamics, as it allows to understand the relationship between the deformation of the tire and the longitudinal forces (i.e. the forces responsible for forward acceleration and braking) acting upon it.
A skid mark is the visible mark left by any solid which moves against another, and is an important aspect of trace evidence analysis in forensic science and forensic engineering. Skid marks caused by tires on roads occur when a vehicle wheel stops rolling and slides or spins on the surface of the road.
An automobile skid is an automobile handling condition where one or more tires are slipping relative to the road, and the overall handling of the vehicle has been affected. Subtypes of skid include: fishtailing, where the vehicle yaws back and forth across the direction of motion. spin or spinout where a vehicle rotates in one direction during ...
Skid brakes involve a long piece of material, often ceramic-covered, that is situated in the middle of the track parallel to the rails. When the brake is engaged, the skid raises and causes friction against the underside of the train, reducing its speed. They can be used to slow or stop the train.
'Deflected' tread path, sideslip velocity and slip angle Graph of cornering force vs slip angle. Cornering force or side force is the lateral (i.e., parallel to wheel axis) force produced by a vehicle tire during cornering.