Newton's Second Law for a Single Force

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SUMMARY

The discussion focuses on calculating the minimum strength required for a fishing line to stop a salmon weighing 85 N, which is initially drifting at 3.0 m/s over a distance of 11.6 cm. The acceleration was determined to be -38.7931 m/s² using the formula F = ma, where the mass was calculated as 8.673 kg. The final force required to stop the salmon was computed as -336.45 N, indicating a need to adjust the direction of the force to account for the fishing line's orientation relative to the salmon's drift velocity.

PREREQUISITES
  • Understanding of Newton's Second Law (F = ma)
  • Basic knowledge of kinematics, including acceleration and velocity
  • Ability to convert weight to mass using gravitational acceleration
  • Familiarity with vector components and their implications in force calculations
NEXT STEPS
  • Review kinematic equations for motion under constant acceleration
  • Explore vector analysis in physics to understand force direction
  • Learn about the implications of negative acceleration in real-world scenarios
  • Investigate the properties of fishing lines and their tensile strength ratings
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as anglers and fishing enthusiasts interested in understanding the dynamics of fishing line strength and its application in stopping fish effectively.

djester555
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Homework Statement


Stopping a Salmon The tension at which a fishing line snaps is commonly called the line's "strength." What minimum strength is needed for a line that is to stop a salmon of weight 85 N in 11.6 cm if the fish is initially drifting at 3.0 m/s? Assume a constant acceleration.


Homework Equations


X1= -0
X2= .116
V1 = 3.0
V2= 0
A = unknown
T = unknown
T =

The Attempt at a Solution


Solved for A and found it to be -38.7931

m = 85 / 9.8


F = ma
F= (8.673)(-38.793)
F = - 336.45
Not sure what i did wrong
 
Physics news on Phys.org
Fishing line may not be in the direction of drift velocity of salmon.
 
so that would swithch the sign to positive then
 

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