Oct272008

POSTED AT 01:51 PM

Look at the illustration using the link below.  Explain (in detail) what forces are acting on the fish.  You must reference what type of motion it is (using the symbol and type - i.e. force of gravity = Weight/W) in reference to a free-body diagram.  As you target each force, explain what part of the fish is causing the force and in what direction.  Extra credit will be issued to well-written, quality 9th grade answers.  Once you have viewed the website below, RETURN TO MY WEB PAGE, click on "add comment" and your comment will post on my web page.

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### Comments

• Ashleigh

There are three forces acting on the fish.
The first force would be gravity, or weight= w.
The arrow for this in a free body diagram would be pointing down.
The second force acting on the fish would be normal. The water is pushing against the fish and the fish is pushing right back. The arrow would be pointing up in a free body diagram.
The third force is friction because the fish is moving in the water. The arrow would be facing toward the right in a free body diagram.

10/28/2008 6:13:00 PM
• Hallie

There are only three forces acting on the force. The force of gravity (W) is pushing down on the fish's body. The fish is assumingly moving foreward so friction (F) is pushing against its head and body acting as an unbalnaced force, and slowing it down. The fish's normal (n) forces acting on it hep the ish swim through the water. If the fish was being dragged in this direction by a fishing line then the sam forces would apply, but one more would also exist as tension (t)

10/29/2008 5:30:39 PM
• owen Lynn

Ok Mr. Fish has three separate forces acting on him, the first force would be gravity acting down on the fish as shown in the diagram , the next force would be (N) which would be water pressure acting on the fish at different depths and different pressures. And finally the last force would be Friction, because as the fish moves forward water runs by the fish slowing it down.

Peace Out :)

10/30/2008 7:41:21 PM
• Sami

there are three forces acting on the fish. the three forces are gravity, normal, and friction. gravity is weight, which equals W. the gravity is pushing down on the fish. another force that is acting on the fish is normal, which equals N. this force is pushing up on the fish. this normal force the water is pushing on the fish, and the fish is pushing on the water. the last force is friction. The fish is moving forward so the friction, which is F, is pushing against the fish's head and body acting as an unbalnaced force, and slowing it down. the three forces acting on the fish are gravity, normal, and friction.

10/30/2008 11:20:02 PM
• Matt Pelletier

The first force acting upon the fish in the free body diagram is friction(F), which is pushing on the fish's head. Even though the unbalanced force being the fluid friction(F)through the water, the force of the thrust exerted from the fish is greater causing it to move forward. Gravity(W)pushing down on the fish and buoyancy(N)pushing up, keeps the fish in place from either floating upward or downward, depending on the force of each. These are all the forces acting on the fish if it were to be moving forward.
If there fish were still and not moving then there would only being two forces acting on the fish. The first force would be gravity(W)pushing down and the second force would be buoyancy(N)pushing upward. Those are the two forces acting upon the fish in no motion.

10/30/2008 11:23:13 PM
• mikayla ashba

ok mr.fish has these forces the first force is
acting upon the fish in the free body diagram is that of friction or ``f'' which pushes on the fishes head.though the unbalenced force called fluid friction through the water,the force from thrust is greater and it pushes it foraward. gravity or w bringind down the fish and boutency or n pushes it up like a boiey causing it to move downward or upward depending on each force all these forces act upon tje fish as if it were moving through the water. now understand if the fish was not moving only 2 of these forces would act upon mr.fish the 2 forces gravity or w and boyency(n)pushing upward.those are the two forces acting on the fish when it is not in motion

12/12/2008 5:52:32 PM

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