Vehicle Dynamics -Part 1_ Module 1.pdf - Mechanics of Machines II Module 1 Vehicle Dynamics Part 1 Prepared by Mr KD Mosimanyane Tractive force Tractive

# Vehicle Dynamics -Part 1_ Module 1.pdf - Mechanics of...

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Module 1: Vehicle Dynamics Part 1 Mechanics of Machines II Prepared by: Mr. KD. Mosimanyane
Tractive force Tractive force or tractive effort or traction is the force applied between the tire and road surface to move a car or any vehicle for that matter. The maximum permissible traction force that can be applied to the wheels is governed by two things: the weight of the vehicle and the adhesion coefficient between the tire and the road surface. More the weight and the adhesion coefficient more amount of tractive force can be applied to the wheels without causing slips between the tires and road.
Vehicle going up a slope Up a slope T = Force required to overcome tractive resistance Wsin ϴ = Force required to overcome gravity ma = Force required to cause acceleration Total force applied = T + ma + Wsin ϴ Total force applied = 0 T + ma + Wsin ϴ = 0 W= mg = m x 9.81 (m is mass of vehicle)
Vehicle going down a slope Down a slope T = Force required to overcome tractive resistance Wsin ϴ = Force required to overcome gravity