What Is the Minimum Strength of a Fishing Line to Stop a Drifting Salmon?

AI Thread Summary
The discussion focuses on calculating the minimum strength of a fishing line required to stop a drifting salmon weighing 87 N. Participants emphasize the need to apply physics principles, particularly Newton's laws, to determine the necessary force and acceleration. The initial calculations involve converting weight to mass and using kinematic equations to find acceleration. There is confusion about the correct approach and application of formulas, particularly in relating the variables for acceleration and force. The thread highlights the importance of understanding the relationship between mass, force, and motion in solving the problem correctly.
MFlood7356
Messages
37
Reaction score
0
1. 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 87 N in 11 cm if the fish is initially drifting horizontally at 3.3 m/s? Assume a constant deceleration.

2. F=ma, W=mg

3. I have a feeling this problem is really easy I just don't know how to do it. I thought I did it correct below but my answer is wrong. Can someone help me please?

W=87N d=0.11m a+3.3m/s
m=87/9.8= 8.89kg
F=(3.3m/s)(8.89kg)= 29.3N
 
Physics news on Phys.org
I don't really understand how this can be a one-dimensional problem.
If it is, you first have to find the acceleration using what is given. ie.
Final velocity = 0
Initial velocity = 3.3 m/s
Displacement = 0.11 m
Try v2 - u2 = 2*a*s to find out the acceleration and multiply it with the mass of the body under consideration.
 
Oh okay. I had no idea I had to relate those equations. Is my mass that I have above correct?
 
So I just tried it and still got it wrong. Here's what I did.

a= 3.32/0.22= 49.5
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

How Strong Does a Fishing Line Need to Be to Stop a Drifting Salmon?
Replies
1
Views
2K
Newton's Second Law for a Single Force
Replies
2
Views
1K
Calculating Line Strength to Stop a Salmon
Replies
27
Views
8K
Tension: Force + Velocity. Breaking Strength.
Replies
1
Views
14K
What Is the Minimum Stopping Distance to Prevent Crate Sliding?
Replies
3
Views
4K
Finding the Minimum Strength of a Fishing Line to Stop a Drifting Fish
Replies
6
Views
3K
Solve Mass of Fish Problem: Acceleration 2 m/s^2, Line Test 8 lbs
Replies
18
Views
4K
What is the net force on the fish in this fishing scenario?
Replies
3
Views
8K
Cylinder over a step -- Is the normal force radial?
Replies
5
Views
3K
Magnetic field strength needed to lift a heavy conductor
Replies
6
Views
8K

Hot Threads

Recent Insights

Back
Top