1 / 20

DENSITY & BUOYANCY

DENSITY & BUOYANCY. BUOYANCY. BUOYANCY = the ability to float in a fluid. Examples of fluids = water, air BUOYANT FORCE = the upward force that acts on a submerged object. It acts opposite of gravity. WEIGHT OF OBJECT. THE BIGGER FORCE WINS, SO THE BLOCK SINKS. BUOYANT FORCE.

doctor
Télécharger la présentation

DENSITY & BUOYANCY

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DENSITY & BUOYANCY

  2. BUOYANCY • BUOYANCY = the ability to float in a fluid. • Examples of fluids = water, air • BUOYANT FORCE = the upward force that acts on a submerged object. • It acts opposite of gravity

  3. WEIGHT OF OBJECT THE BIGGER FORCE WINS, SO THE BLOCK SINKS BUOYANT FORCE

  4. Which one is easier to pick up? Why?

  5. This beach ball floats. Why?

  6. Because the Buoyant Force is greater than the weight of the ball.

  7. ARCHIMEDES’ PRINCIPLE The buoyant force acting on a submerged object is equal to the weight of the fluid the object displaces.

  8. ARCHIMEDES’ PRINCIPLE states that the WEIGHT of the amount of water displaced is equal to the BUOYANTFORCE.

  9. Mass = 90 kg Mass = 90 kg B A WHICH ONE IS MORE LIKELY TO FLOAT?

  10. DENSITY DOESN’T DENSITY HAVE SOMETHING TO DO WITH IF SOMETHING SINKS OR FLOATS?

  11. DENSITY d = m / v DENSITY OF WATER = 1 g/cm3 • If the object has a higher density, it sinks. • If the object has a lower density, it floats. • if the object has the same density, it flinks (floats in the middle of the water).

  12. DENSITY & BUOYANCY • Having a lower density than water means that the beach ball’s buoyant force is higher than the weight of the beach ball. SO THE BEACH BALL FLOATS. WATER

  13. DENSITY & BUOYANCY • Having a higher density than water means that the cinder block’s buoyant force is lower than the weight of the cinder block. SO THE CINDER BLOCK SINKS. WATER

  14. DENSITY & BUOYANCY • Having the same density as water means that the boot’s buoyant force is equal to the weight of the boot. SO THE BOOT NEITHER SINKS NOR FLOATS, IT FLINKS WATER

  15. m d = v CHANGING DENSITY You can change an object’s density by: • Increasing/decreasing its mass • Increasing/decreasing its volume

  16. AN OBJECT FLOATS CAUSES: • Weight is less than the buoyant force. • Object is less dense than the fluid • Object decreases its mass and becomes less dense than the fluid. • Object increases its volume and becomes denser than the fluid.

  17. AN OBJECT SINKS CAUSES: • Weight is greater than the buoyant force. • Object is denser than the fluid • Object increases its mass and becomes denser than the fluid. • Object decreases its volume and becomes denser than the fluid.

More Related