A community for students.
Here's the question you clicked on:
 0 viewing
AravindG
 4 years ago
doubts on newton laws of motion
AravindG
 4 years ago
doubts on newton laws of motion

This Question is Closed

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1how many types of inertia are there?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Typically, we consider two. That associated with linear motion and that associated with rotational motion.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1oh i was asking like inertia of rest ,inertia of motion,inertia of direction etc

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0They are all the same. Inertia is simply a measure of how an object resists a change in motion.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1hmm. can u xplain inertia of direction and based on tht reason this: wheels of vehicles are provided with mudguards

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0The mud has a tendency to always maintain the same direction of travel. Eventually, this tendency exceeds the forces acting on the mud by the tire. When this happens, the mud will leave the tire in a tangential manner.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1doubt 2:a body of mass 2kg moves with an acceleration of 3 m/s^2 find change in momentum in in one second

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1y is it the answer force ma?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0That is the definition of Newton's Second Law. \[F = {d \vec p \over dt}\]

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1doubt 3:what is average force?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[F_{avg} = {\Delta \vec p \over \Delta t}\]

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1doubt 4:A shell explodes in mid air into 2 equal fragments.what is direction of motion of 2 particles .explain this

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0This is a result of internal forces only. Since Newton's Second Law considers only external forces, there are couple inferences we can draw. Let's assume the shell is at rest when it explodes. First, the center of mass of the two particles will remain at the same point in space. Second, the net momentum of the two particles will equal zero (because the object is initially at rest).

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1can u xplain more i am cnfused

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0The exact direction and nature of the motion of the two particles after the explosion is dependent on the nature of the explosion force.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1hw can we make such an assumption

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1y dont we consider gravity as external force?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Gravity can be considered. The center of mass of the two particles will follow the path prescribed by the external forces.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0This is definitely classical mechanics.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0What are you confused about?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Let's keep things simple for now. Air resistance will change things.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1wel wat is direction of motion

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0The motion of the individual particles is dependent on the nature of the explosion. The center of mass however, will have motion as described by external forces.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1my text says they move in opp directions

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1for cinservation of momentum

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Their net momentum after the explosion must equal the momentum of the shell before explosion. Because momentum is a vector quantity, they will travel away from each other (i.e. their velocities will have opposite signs).

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1we assume it was at rest??

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Let's take the simplest example. Take the shell to be on the ground, which is smooth. After the explosion the net momentum will be zero.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1mth3v4 pls dont mess around

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0If the shell is in motion. The net momentum of the two particles will equal the momentum of the shell before the explosion.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1hw do we recognize an internal force ?? u see i am vonfused with that

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I already established this as being classical mechanics. Please don't comment if you don't have anything valuable to add.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I don't understand the question Aravind

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1wel u see an example like i hav a fan kept in a boat

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1then i turn the fan on facing the sail

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Nvm. I understand. An internal force is one that does not mechanical energy of a system.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0An internal force is one that does not change the mechanical energy of a system.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1hw do we recognize that . u seei thought he wind from fan can move the boat

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Newton's Third Law. The fan pushes the wind against the sail, but the wind pushes back on the fan. Since the fan and sail are coupled by the boat, the boat doesn't move.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1328338036916:dw

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1hw can wind return to fan??

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Those are forces. The square below represents the boat system. There are not external forces. dw:1328338113551:dw

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1srry easmore bt i am not getting u

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1i dont understand hww a return force acts on fan

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Do you doubt the existence of the return force or what causes the return force?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Instead of a fan. Let's say you push directly on the sail mast. In this case, would the boat move?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I have to leave soon.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1hey gogind can we cntinu with this discussion?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0hmm..lets see...You are having trouble with imagining the force that is acting on the fan, correct?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Try imagine in like this. Fan pushes a bunch of molecules to the sail of the boat (we call that wind) , but since all these little molecules have some mass, newtons 3rd laws says that: As the blade of the fan exerts force on the molecules, all those molecules must exert the same force on the blade but it in opposite direction. OK! So now there is a bunch of molecules traveling towards the sail and eventually hitting it. When they hit the sail the same thing happens, they exert force on the sail, and since the sail is connected to the boat, they actually exert in on the boat. So in conclusion: The boat wants to go backwards, because of the force molecules exert on the blade of the fan which is connected to the boat, but the same molecules hit the sail which is also connected to the boat, causing the boat wanting to go forward. So the net result of this two forces is 0, because they have the same magnitude but opposite direction. What do you think would happen if there was no sail?

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1hmmm..it would have remained in rest

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0if there IS a sail it would remain at rest, because the forces cancel each other. If there were NO sail at all, the boat would travel backwards. In the boat with no sail, molecules that acted on the blade of the fan would just travel in the opposite direction of the boat with nothing to stop them (no sail), so the only force that is acting on the boat is the one acting on the fan, since there is not force to cancel in out the boat would move backwards.

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1but is it sure that alll molecules from fan would hit the sail??

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0of course not. What we are talking about here is the ideal situation. In real life a good part of molecules would not hit sail. Imagine you had a really small sail and a huge fan, some molecules would hit the sail but a bigger part of them would not. So the net effect would be that you are moving backwards. In this case the force acting on the blades is much garter then the one acting on the sail...

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1k i understood it cmpletely thx

AravindG
 4 years ago
Best ResponseYou've already chosen the best response.1i hav some othr doubts too can u help?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I don't have time, since I'm studying right now. Just post the question in the group and someone will answer, if they don't I'll answer later if I can

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I don't know, when I get tired i guess :D. Just post on the group I'm sure someone will take a look at it
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.