4.2 REVIEW

3. Construct a diagram of the forces on a jellyfish suspended in water. Include forces from pressure on top, the sides, and the bottom of the jellyfish. Also include the buoyant force and the force from the weight of the jellyfish.

(Check notability) Gravity coming down Buoyancy going up Pressure coming from different directions

5. If the person and the raft shown below together weigh 550 N then how large is the buoyant force on them?

550 N

7. Use Archimedes' principle to explain why it is easier to lift a rock in water than it is to lift the same rock in air.

Buoyancy is pushing against gravity to help it go up

2. Relate buoyant force to pressure

Buoyant force is an upward force by a fluid on an object in the fluid and pressure is The amount of force per unit area applied to an objects surface.

4. the density of the water is 1 g/cm3. Which of these floats in water?

C.

6. Copy and complete the graphic organizer stating the relative sizes of forces acting on an object.

Object sinks- sinks if the weight is grater than buoyant force (8 ball) If buoyant force and weight are balanced, it floats! (Tennis ball)

1. State Archimedes' principle in your own words.

The weight of the fluid that an object displaces is equal to the buoyant force acting on the object.