An object of mass 20 kg is released from rest and allowed to fall under the influence of gravity. Assume that the force in Newtons due to air resistance is -28v where v is the velocity of the object in m/s. If it is initially dropped from a height of 800 meters, approximately how long will it take to reach the ground? Use x (t) as the distance below the point from where it was dropped.

Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter6: Motion In Two Dimensions
Section6.3: Relative Velocity
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An object of mass 20 kg is released from rest and allowed to fall under the influence of gravity.
Assume that the force in Newtons due to air resistance is -28 where v is the velocity of the object
in m/s. If it is initially dropped from a height of 800 meters, approximately how long will it take to
reach the ground?
Use x (t) as the distance below the point from where it was dropped.
Transcribed Image Text:An object of mass 20 kg is released from rest and allowed to fall under the influence of gravity. Assume that the force in Newtons due to air resistance is -28 where v is the velocity of the object in m/s. If it is initially dropped from a height of 800 meters, approximately how long will it take to reach the ground? Use x (t) as the distance below the point from where it was dropped.
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