"Will a sinking object be affected by the buoyancy of water?" Sinking and Floating PPT

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"Will a sinking object be affected by the buoyancy of water?" Sinking and Floating PPT

Part One: Exploring New Knowledge

Is the sinking object affected by the buoyant force of the water?

Think about it: when you lift water from a well, the same bucket filled with water feels much heavier when it leaves the water than when it is in the water. Why is this? Does the bucket also experience the buoyancy of the water in the water?

Experimental results

The sinking object is also subject to the buoyancy of the water. The calculation method of buoyancy is: buoyancy = gravity - spring balance tension.

The amount of buoyant force exerted by the water on a sinking object

Experiment to measure the buoyancy of a sinking object (1):

1. Measure the gravity of an object in the air;

2. Measure the tension of the spring scale when the object is immersed in water at different positions;

3. Calculate the buoyancy force received by the hook code and compare it with the amount of water displaced;

4. Record everything in the form.

Experiment to measure the buoyancy of a sinking object (2):

1. Measure the gravity of the same stone of different sizes in the air;

2. Measure the pulling force of the spring balance when the same type of stones of different sizes are completely immersed in water;

3. Calculate the buoyancy force on the same type of rocks of different sizes and compare it with the amount of water displaced;

4. Record everything in the form.

Will a sinking object be affected by the buoyancy of water? PPT, Part 2: Extension

When Cao Cao's son Cao Chong was five or six years old, Sun Quan sent him a giant elephant. Cao Cao wanted to know the weight of the elephant, so he asked his subordinates, but none of them could tell how to weigh the elephant. Cao Chong said: "Put the elephant on the big boat, mark the place where the water surface reaches, and then let the boat load other things. When the water surface also reaches the mark, weigh the weight of these things, and you can know the weight of the elephant. It’s heavy.” Cao Cao was very happy after hearing this and immediately followed this method. As expected, he weighed the elephant.

Will a sinking object be affected by the buoyancy of water? PPT, Part 3: Summary of this lesson

A sinking object will be affected by the buoyant force of water. The larger the volume immersed in the water (amount of water displaced), the greater the buoyant force exerted by the water.

Will a sinking object be affected by the buoyancy of water? PPT, Part 4: Exercises for this lesson

1. Multiple choice questions

1. The relationship between the gravity and buoyancy of a sinking object is ( )

A. Gravity > Buoyancy B. Gravity < Buoyancy C. Gravity = Buoyancy

2. Objects of different sizes are completely immersed in water. The buoyancy force they receive in the water is related to the amount of water displaced by the object ( ).

A. Weight B. Volume C. Displacement

2. Judgment questions

1. Sinking objects will not be affected by buoyancy. ( )

2. We can feel the effect of buoyancy and measure the force with a dynamometer. ( )

3. The larger the volume of a sinking object immersed in water, the smaller the buoyancy force it receives. ( )

4. When a paper clip is in water, its buoyancy is less than gravity. ( )

Will a sinking object be affected by the buoyancy of water? PPT, Part 5: Homework

A sinking object will float up due to buoyancy. Check the information to explain this phenomenon.

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"Will a sinking object be affected by the buoyancy of water?" Sinking and Floating PPT Courseware 4:

"Will a sinking object be subject to the buoyancy of water?" Sinking and Floating PPT Courseware 4 In life, we will encounter such a situation: when fetching water from a well, the bucket is also filled with water. After leaving the water, it will be larger than before. It feels much heavier in the water. Is this because of the water surface? Is it filled with water?

"Will a sinking object be affected by the buoyancy of water?" Sinking and Floating PPT Courseware 3:

"Will a sinking object be affected by the buoyancy of water?" Sinking and Floating PPT Courseware 3 Imagine that when you lift water with a bucket, it is also a bucket filled with water. Do you feel that it is much heavier after leaving the water than in the water? why? It's not that there is a force holding the bucket in the water.

"Will a sinking object be affected by the buoyancy of water?" Sinking and Floating PPT Courseware 2:

"Will a sinking object be affected by the buoyancy of water?" Sink and Float PPT Courseware 2 Are the two measurements the same size? Where is the pulling force greater and where is the pulling force smaller? Why are there different pulling forces? Tension + Buoyancy = Gravity Experiment: Measure the force exerted on small stones of different sizes...

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Update Time: 2024-11-22

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