Objectives -Together we will discuss the forces at work when an object is submerged -We will understand why things float and why they sink -We will apply.

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Presentation transcript:

Objectives -Together we will discuss the forces at work when an object is submerged -We will understand why things float and why they sink -We will apply what we have learned into the design of our SeaPerch ROV

Before we begin... Think about what you have seen already about Buoyant Force and Gravity Can you explain what is happening in this picture?

Notebook ideas Vocabulary -keep it updated Add entries to your daily Journal Keep sketching ideas!

Types of Buoyancy Negative The object weighs more than the water it is displacing Neutral The object weighs the same as the water it is displacing Positive The object weighs less than the water it is displacing What are we trying to achieve with our ROVs?

Basic Concepts To fully understand Buoyancy we must examine: Volume Density Displacement

Volume The quantity of three-dimensional space enclosed by some closed boundary

Calculating Volume Formulas for Volume Sphere Rectangular Block or Cube Cylinder Odd Shape

Volume: Calculation Some object volumes can be calculated What is the volume formula for each object?

Density The amount of mass per unit volume of a substance or object MASS: the amount of matter in an object or substance

Density

Displacement to move or put out of the usual or proper place

Displacement Original Water Line New Water Line As the Ship is lowered into the water, the water level rises.

"ε ὕ ρηκα!" ncy Archimedes's Principle: Any floating object displaces its own weight of fluid.

Objects sink or float based upon density A block of steel is denser than water, so it sinks. Shaping the block into a hollow form increases the volume occupied by the mass, which results in a reduced overall density. The ship floats.