Understanding Newton's Laws of Motion: Exploring Block Movement and Friction"

In summary, the conversation discussed the scenario of two blocks stacked on top of each other and a force being applied to the bottom block causing the top block to fall. The question was raised about why the top block falls instead of moving with the bottom block, assuming there is no friction between the two. The conversation then shifted to discussing Newton's Laws, specifically the First Law which states that a body remains in motion or at rest until an unbalanced force is acted on it. It was determined that in the absence of friction, there is no other force acting on the top block, therefore it will remain in its position while the bottom block moves forward.
  • #1
Shardul Khare
23
0
When a keep two blocks one over another...And apply a foce on the block which is below...Why does the upper block falls down..Why dosent it move with A? assumin there's no friction between A and B?
 
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  • #2
Shardul Khare said:
When a keep two blocks one over another...And apply a foce on the block which is below...Why does the upper block falls down..Why dosent it move with A? assumin there's no friction between A and B?
Why do you think? Which of Newton's Laws might apply to this situation?
 
  • #3
phinds said:
Why do you think? Which of Newton's Laws might apply to this situation?
No idea
 
  • #4
Well, look at it this way. You are surprised that the upper block falls down when the lower block moves out from under it. Ask yourself why SHOULD the upper block move with the lower block?
 
  • #5
Shardul Khare said:
No idea

Aren't you being a bit lazy here?

Try this. How about you write down, in this thread, all 3 of Newton's Laws? You may copy that from your text, but better yet, state them in your own words to see if you actually not just read them, but comprehend what they say. Then we can jump off from there.

Zz.
 
  • #6
First Law states that A body continues to be in motion or at rest until an unbalanced force is acted on it
Second law-sEOCND LAW - f=MA
Third Law: Every action has an equal and opposite reaction
 
  • #7
Shardul Khare said:
First Law states that A body continues to be in motion or at rest until an unbalanced force is acted on it
Second law-sEOCND LAW - f=MA
Third Law: Every action has an equal and opposite reaction

Now, look at your question, and then look at the First Law. In particular, if there's no friction between A and B, how would the First Law be relevant here?

Zz.
 
  • #8
The Normal and Mg cancel out,no friction means no other force acting on B,right?
 
  • #9
ZapperZ said:
Now, look at your question, and then look at the First Law. In particular, if there's no friction between A and B, how would the First Law be relevant here?

Zz.
 
  • #10
Shardul Khare said:
The Normal and Mg cancel out,no friction means no other force acting on B,right?
RIght. And what happens to a body with no force acting on it?
 
  • #11
It remains unaccelerated, So when we apply force on the lower bloack,the upper block will stay where it is and the lower block will mover forward, am i right?
 
  • #12
Shardul Khare said:
It remains unaccelerated, So when we apply force on the lower bloack,the upper block will stay where it is and the lower block will mover forward, am i right?
yes, that's where I was leading you in post #4
 
  • #13
phinds said:
yes, that's where I was leading you in post #4
Thank you :)
 

What are Newton's Laws of Motion?

Newton's Laws of Motion are a set of three physical laws that describe the relationship between the forces acting on an object and its motion. They were developed by Sir Isaac Newton in the late 17th century and are considered fundamental principles in the field of classical mechanics.

What is Newton's First Law?

Newton's First Law, also known as the Law of Inertia, states that an object at rest will remain at rest and an object in motion will remain in motion at a constant velocity unless acted upon by an external force.

What is Newton's Second Law?

Newton's Second Law, also known as the Law of Acceleration, states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. In other words, the greater the force applied to an object, the greater its acceleration will be, and the more massive the object is, the less it will accelerate.

What is Newton's Third Law?

Newton's Third Law, also known as the Law of Action and Reaction, states that for every action, there is an equal and opposite reaction. This means that when two objects interact, the forces they exert on each other are equal in magnitude and opposite in direction.

How do Newton's Laws of Motion apply to everyday life?

Newton's Laws of Motion are applied in many aspects of everyday life, from simple activities like walking and driving a car, to more complex systems like space travel. They help explain and predict the behavior of objects in motion and are essential in the design and functioning of machines and structures.

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