Question

1. Three objects have the same volume, one spherical, one rectangular, and the other cylindrical. If...

1. Three objects have the same volume, one spherical, one rectangular, and the other cylindrical. If you put these 3 objects under water, how do their buoyant upward forces compare?

A.

According to Archimedes’ Principle, they are all subject to the same amount of buoyant forces because they have the same volume

B.

The cylindrical object gets the most buoyant force because it has a longer shape

C.

The rectangular object gets the most buoyant force because of its flat bottom

D.

The spherical object gets the most buoyant force because its surface area is the smallest

2. In simulation, if you set Base area of body: 100 cm2, Height of body:5 cm, Density of body:3 g/cm3, Density of liquid: 1 g/cm3, and then the Buoyant force is

A.

9.8 N

B.

2.2 N

C.

4.91 N

D.

1.3 N

3. In simulation, if you set Base area of body: 100 cm2, Height of body:5 cm, Density of body:3 g/cm3, Density of liquid: 2 g/cm3, and then the Buoyant force is

A.

3.9 N

B.

2.5 N

C.

9.8 N

D.

4.9 N

4. If you submerge an object at 3 different depths under water, at what depth does it receive the most buoyant force?

A.

The force is largest at the highest location

B.

The force is largest at the lowest location

C.

According to Archimedes’ Principle, the buoyant force doesn’t change with depth, as long as it is all submerged (it displaces the same amount of water at different depths.

D.

The force is the largest at the middle depth

Homework Answers

Answer #1

1.According to Archimedes’ Principle, they are all subject to the same amount of buoyant forces because they have the same volume.

Buoyant force= (Density of liquid)×(volume submerged)×g

As the volume is same all will experience same amount of buoyant force.

4.According to Archimedes’ Principle, the buoyant force doesn’t change with depth, as long as it is all submerged (it displaces the same amount of water at different depths.

Buoyant force= (Density of liquid)×(volume submerged)×g

As we can see it doesn't depend upon the depth of water.

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