- An object of mass 20 kg is released from rest 1000 m above the ground and allowed to fall under the influence of gravity Assuming the force due to air resistance is proportional to the velocity of the object with proportionality constant b 50 N-secim determine the equation of motion of the object When will the object strike the ground? Assume that the acceleration due to gravity is 9 81 m/sec and let it represent the distance the defect has fallen in 1 seconds Determine the equation of motion of the object

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