Physics Of Fishing

[DogBone_384]

Here is a question to solve; How much does a 1/2 jig weigh in water?

-or- How much does a live 10 lb bass weigh in water, more or less than a 1/2 jig?

Tom

 

A 1/2 ounce jig, in water, weighs less than a pound of feathers..... that much I'm sure of....

[Sam]

A great book is The Physics of Baseball.

If you are interested in physics try find a paperback copy of this book.

It will blow you away as to the infinite space on a baseball and bat between a high pop fly and a long home run and the other aspects of the game of baseball.

[WRB]

A 1/2 ounce jig, in water, weighs less than a pound of feathers..... that much I'm sure of....

For purposes of this thread a jig being heavy dense metal that isn't designed to displace water like a ships hull and the density of the water being average, it weighs approximately 80% lighter 0r 20% of it's mass in water: 1/2 jig is about 1/10 oz. The bass, regardless of it's weight. is neutral weight when the air bladder is acclimated to the depth the bass suspends or...it weighs nothing until it eats something or changes depth.

Tom

[scaleface]

For purposes of this thread a jig being heavy dense metal that isn't designed to displace water like a ships hull and the density of the water being average, it weighs approximately 80% lighter 0r 20% of it's mass in water: 1/2 jig is about 1/10 oz. The bass, regardless of it's weight. is neutral weight when the air bladder is acclimated to the depth the bass suspends or...it weighs nothing until it eats something or changes depth.

Tom

So if you have 500 lbs of water in a tub and add a five pound bass , it still weighs 500 lbs ?

[WRB]

The bass are buoyed by thier bladder, like having a PFD, their body mass still has weight, although it's buoyant and the mass displaces a volume of water that weighs 6.5 lbs/gallon. The volume of water (approximately 77 gallons) would increase by the mass displaced by the bass.

Astronauts train underwater with neutral buoyancy because it simulates weightlessness in space. The astronaut still weighs the same out of water, however is weightless in water due to being buoyant, same as the bass.

Tom

[Jar11591]

Physics should not only be considered in fishing, but in every aspect of life. Helps you understand the world around you.

[Paul Roberts]

Energy flow (deciphered through thermodynamic laws) underpins everything biological.

[HoosierHawgs]

Energy flow (deciphered through thermodynamic laws) underpins everything biological.

Like trophic levels?

[BigSkyBasser]

Yeah, sometimes I think about how the lure I'm using produces sounds, and how the decibels travel through certain aspects of the water I'm fishing. I haven't studied acoustics.......or physics at all for that matter in several years but still find it quite intriguing and still do a little self prompted research here and there.

 

I remember doing a paper on the difference between sound frequency measurements between Water and Air and their standard reference intensities........it was way beyond what we were studying and my science teacher was fairly impressed. 

[HoosierHawgs]

Yeah, sometimes I think about how the lure I'm using produces sounds, and how the decibels travel through certain aspects of the water I'm fishing. I haven't studied acoustics.......or physics at all for that matter in several years but still find it quite intriguing and still do a little self prompted research here and there.

I remember doing a paper on the difference between sound frequency measurements between Water and Air and their standard reference intensities........it was way beyond what we were studying and my science teacher was fairly impressed.

Nice! I'm fairly certain that sound travels better in water if I am not mistake, correct? I believe its just that our ears are not optimized for water.

[clh121787]

The physics of fishing for me = chunk & wind

[BigSkyBasser]

Nice! I'm fairly certain that sound travels better in water if I am not mistake, correct? I believe its just that our ears are not optimized for water.

 

To my understanding yes but there are exceptions. Water can inhibit an object's ability to create vibrations at the intensity they would in air due to increased resistance.

[Ozark_Basser]

Yes. Riddle me this. Why would a 1/2 oz jig sink faster than a 1/4 oz jig (same trailer)?

This is intetesting. If i dropped both the 1/4 oz and 1/2 oz jigs from a roof simultaneously, they both would hit the ground at the same time. This however is not true in water where instead of air molecules pushing on the two falling objects, you have considerably more molecules posing as water pushing against the two objects. The force is strong enough from the water that it causes lighter objects to descend slower than heavier objects. Force = mass x acceleration......The greater the mass = the greater the force = the less water can try to do about the object reaching the earth which in our case is the lake bottom.

[HoosierHawgs]

This is intetesting. If i dropped both the 1/4 oz and 1/2 oz jigs from a roof simultaneously, they both would hit the ground at the same time. This however is not true in water where instead of air molecules pushing on the two falling objects, you have considerably more molecules posing as water pushing against the two objects. The force is strong enough from the water that it causes lighter objects to descend slower than heavier objects. Force = mass x acceleration......The greater the mass = the greater the force = the less water can try to do about the object reaching the earth which in our case is the lake bottom.

Mind that this only happens in actual "air" with two objects with the same coefficient of friction, is. Two rocks.

[Ozark_Basser]

True. It would be ridiculous to say a feather and a rock would fall at the same rate.

[geo g]

Too much thought, I fish to clear my mind and just react to nature!

[HoosierHawgs]

True. It would be ridiculous to say a feather and a rock would fall at the same rate.

Unless in a vacuum of course.

[WRB]

True. It would be ridiculous to say a feather and a rock would fall at the same rate.

Based on weight alone they do fall at the same rate 32 (32.147) feet per second, give or take gravity and altitude.

Aerodynamic effects the resistance, a feathers and airplanes glide. A BB will fall the same rate and speed as a bowling ball, same aerodynamic shape. Shape also affects sink rate in water, a bowl shaped rock or iron vessel can float depending on surface area, boat or ship are good examples. The coefficient of line drag affects how fast your jig sinks or the feed back of your lure tied to line. You think the line is stretching when in fact there is a bow in the line caused by the water density creating drag.

Don't need to understand all the formulas, just need to be aware that physics can play a roll in your fishing.

Tom

[WRB]

Unless in a vacuum of course.

Only is there is gravity present, no gravity both are weightless.

Tom