Question

# An automobile vehicle has a mass of $$1500$$kg. 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      $$|a| = 1.7$$  $$ms^{-2}$$                Mass of the vehicle      $$m = 1500 kg$$Thus the force between the vehicle and the road        $$|f| = ma$$$$|f| = 1500 \times 1.7 = 2550 N$$ScienceNCERTStandard IX

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