# Q 8.      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?

D Devendra Khairwa

By Newton's law of motion, we have :

$F\ =\ ma$

and                                                      $=\ 1500\times 1.7$

or                                                  $F\ =\ -2550\ N$

Thus the retarding force required is 2550 N in the direction opposite to the motion of the vehicle

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