Science Question?

Question

What is the effect of
thrust
drag
gravity
and buoyancy
on a submarine
Please answer each.

Answer 1

Good question!

1. thrust - propels the submarine
2. drag - generated by the water as it resist to be pushed out of the way by the submarine and is apposite to trust.
3. gravity – is a force that is trying to pull the submarine to the bottom of the ocean.
4. buoyancy - Just the right amount allows the submarine to remain between the surface and the oceanic bottom. Buoyancy is trying to counteract gravity and pushes the submarine out of the water with a force equal to the weight of the volume of water displaced by the submarine.

The submarine has compartments called ballast tanks that are filled with just the right amount of water/ air that are responsible for allowing the submarine to dive or come to the surface.

See Archimedes principle.

Answer 2

Thrust: power generated by the propeller, most of the time forcing the sub to move forward;

Drag: resistance (force) of the surrounding water, causing the sub to reach zero velocity relative to the surrounding water, if no thrust is present (note the sub may be in a below-the-surface stream);

Gravity: force acting on any object on Earth, pulling it towards the center of the Earth (or to the nearest solid surface);

Buoyancy: upward force, equal to the weight of fluid displaced by an object (Note weight = mass x local gravitational acceleration);

Answer 3

thrust: is a tricky one. I suppose you could say its the force of thrusting it through the water.
drag: The act of the water slowing the sub down.
gravity: The force that pulls the sub deeper.
buoyancy: The act of the sub bobbing back up to the surface. - When the air tanks are full the sub is very 'buoyant'

Answer 4

You really should do your homework ALL by yourself. Sure, someone CAN answer this question for you, but you will not learn ANYTHING by them doing so.
Read your science book, apply some THINKING to the problem, and you will actually LEARN the answer.

Answer 5

do you mean on the people in the sub or the sub its self?