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Question:

An automobile vehicle has a mass of 1500kg. What must be the force between the vehicle and road if the vehicle is to be stopped with a negative acceleration of 1.7 m s⁻²?

Solution:

Given : Retardation or negative acceleration |a|=1.7ms⁻²; Mass of the vehicle m=1500kg
Thus the force between the vehicle and the road |f|=ma
|f|=1500×1.7=2550N