I am trying to figure out how much force i need to pull to drag an

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SUMMARY

The discussion focuses on calculating the force required to drag an object weighing between 11-21 kg with a surface area of 1634 square inches from a depth of 100-200 meters. Key factors include the object's weight, water resistance, and buoyancy, which is determined by the object's volume and the density of water. To find the necessary force, one must apply Newton's laws by adding the weight of the object and water resistance, then subtracting the buoyancy force. The impact of velocity on water resistance is also highlighted, indicating that minimal force is needed at low velocities.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Knowledge of buoyancy principles and calculations
  • Familiarity with water resistance and drag forces
  • Basic grasp of object weight and gravitational acceleration
NEXT STEPS
  • Research buoyancy calculations using volume and water density
  • Learn about calculating drag force at varying velocities
  • Explore Newton's laws of motion in practical applications
  • Study the relationship between surface area and water resistance
USEFUL FOR

Engineers, physicists, and anyone involved in fluid dynamics or object manipulation in water environments will benefit from this discussion.

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I am trying to figure out how much force i need to pull to drag an object with a given surface 1634 square inch and weight from a given depth. Between 100 - 200 m 11-21kg psi. However I do not know how to use Newtons laws correctly in this senario. The object does not the to accelerate. Can you please help me to understand?

Thanks
 
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You need the volume, too, as it is relevant for buoyancy.
Do you pull it vertically? In this case, add the weight (mass of object * gravitational acceleration) and the water resistance, and subtract buoyancy (density of water * volume of object * gravitational acceleration).

Water resistance (drag) depends on your object and the velocity. If you want to calculate the minimal force required to lift the object (and if you are patient enough), ignore this part, the resistance will be very small if the velocity is small. For high velocities, this is the most important part.
 

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