Experiment and explain finding resultant force of several forces on the same plane acting on objects.
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Q 1/20
Score 0
A piece of wood and a piece of metal of the same volume are placed in water. The wood floats, but the metal sinks. Why does this happen?
30
Metal displaces more water
Wood is less dense than water, while metal is more dense
Wood has more mass than metal
Water exerts more pressure on the wood than on the metal
Q 2/20
Score 0
An object has a weight of 10 N in air and 8 N in water. What is the buoyant force acting on it?
30
10 N
8 N
18 N
2 N
20 questions
Q.
A piece of wood and a piece of metal of the same volume are placed in water. The wood floats, but the metal sinks. Why does this happen?
1
30 sec
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Q.
An object has a weight of 10 N in air and 8 N in water. What is the buoyant force acting on it?
2
30 sec
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Q.
A rock weighs 15 N in air and 9 N in water. What is the weight of the water displaced by the rock?
3
30 sec
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Q.
Why does an object feel lighter when submerged in water?
4
30 sec
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Q.
A ship floats in water because it...
5
30 sec
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Q.
If a solid object sinks in water, what can be said about its density?
6
30 sec
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Q.
During an experiment, you measure an object’s weight in air as 12 N and its weight in water as 10 N. What can you conclude about the buoyant force?
7
30 sec
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Q.
A cube with a density of 0.8 g/cm³ is placed in water (density of water is 1.0 g/cm³). What will happen to the cube?
8
30 sec
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Q.
An object displaces 3 liters of water when submerged. What is the buoyant force acting on it?
9
30 sec
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Q.
Why does a helium balloon rise in air?
10
30 sec
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Q.
In a beaker filled with water, why does an ice cube float?
11
30 sec
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Q.
An experiment shows that a 20 N object weighs 12 N in water. What is the volume of water displaced?
12
30 sec
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Q.
A submerged object weighs 15 N less than it does in air. What is the buoyant force acting on the object?
13
30 sec
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Q.
Why do steel ships float despite steel being denser than water?
14
30 sec
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Q.
Which of the following best explains why objects weigh less in water than in air?
15
30 sec
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Q.
During an experiment, a student finds that a block weighs 30 N in air and 20 N in water. What is the density of the block if it displaces 1 liter of water?
16
30 sec
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Q.
A stone sinks in water but floats in mercury. Why?
17
30 sec
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Q.
What will happen if an object with the same density as water is placed in water?
18
30 sec
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Q.
An object weighs 50 N in air and 30 N in water. What is the volume of the object?
19
30 sec
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Q.
A metal cube sinks in water but floats in a liquid with a density of 2.5 g/cm³. What can you conclude about the cube’s density?
