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Preparation Tips for JEE Mains & Advanced 2019
Preparing for the exams is definitely hectic and tiring job. JEE main exams and advanced 2019 study is undoubtedly one of the most satisfying things that you would do for your profession and future. Having tremendous hold on basics of Maths, Chemistry and Physics can actually open up many options for your career. You should think about those two years as your basics towards a bright future. JEE mains will fetch you many lucrative jobs and positions. Here are few tips that you can make use for JEE mains and advanced 2019.
Time management: you should know how to manage your time while studying. Many students who work and have applied for the JEE mains exams need to incorporate their daily schedules. They need to manage the time between work and study. Nothing will happen if you are not managing time to study proper subjects. You have to give time to each subject. You should realize the truth behind planning and take out time for yourself too. Always remember, one needs to work in a smart way rather than working really hard. There is a huge difference between lying with a book for eighteen hours and actually preparing for eighteen hours. You simply do not want to lying down with competitive exam papers and book in a hand. Your time is precious and very limited. So invest accordingly.
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You should finish the most significant task primarily. Organic chemistry indeed is vital and check out different studies involved in JEE mains and advanced 2019. You will get many papers online. Once you are done with vital issues and papers, you will be able to handle the next vital task and chapters.
Say “NO” to family and friends: you should know what is important right now in your life. The exams are on head and you have to deal with family and friends. Start saying NO to them who try to divert you from your preparations. Tell them NO in a polite way. Preparing for JEE mains is not an easy task and needs lot of patience and perseverance.
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Do not aspire for incremental development or procrastinate: do not ever try to postpone your studies and leave it on tomorrow as that tomorrow never comes. Start studying from today and take out time for important subjects. Make a plan for study. According to your planning keep one subject at a time. Keep revising it and understand it rather than gulping each and every word.
Make daily targets: you need to set daily targets that includes, topic study, preparing important notes, solve practice numerical and questions, solve two exam papers a day, mock tests, sample papers, IIT JEE last year question papers etc. Study at least 18 hours with regular intervals as rigid study is not beneficial and will block your mind. Spend at least 7 to 8 hours in solving sample papers. Once you set daily targets it becomes easy for you to work out things.
Std 11, Physics, Kinematics, Ch-08 Relative Motion
It is the study of one object with respect to other. Done, okay.
Let’s consider two objects A and B, they are moving in, they are moving in 3D, they are moving in any direction. Like two birds, one is flying here, one there, random, anywhere. Now suppose at any time A object is here and at that time B object is here, okay. Tell me something, what is this, what is that, this vector? Position vector of A with respect to origin, that means according to origin, this must be the position vector of A with respect to O, O the origin. And what do you think of this one?
[students answering]
Definitely position vector of B with respect to origin. See, I am writing position of A with respect to origin, position of B with respect to origin. Certainly I can write position of B with respect to A. What should be the vector? Vector joining from A to B. Yes or no? So this becomes position vector of B with respect to A. Now see, the velocity of A that will be responsible to change the position of this vector. Because of the velocity of A, the position of rAo will change or no? And because of the velocity of B, rBo will change. What will be the cause of this changing?
[Students answering – both]
Both. Meaning relative velocity of B with respect to A.
Now look carefully, if I use the triangle approach, then you can see that out of the three vectors one vector is resultant.
[yes, sir]
Which one is resultant? rBo. How do you get that? Two head and two tail, you can write it like this. Okay? That means I get a new formula. Position vector of B with respect to A is written like write the position vector of B with respect to O and A with respect to O and then you minus that. Done? This is simple.
See generally we discuss motion by using the parameters given with respect to ground. So I am rewriting the concept by using reference as ground. So position vector of B with respect to A is position vector of B with respect to ground meaning real position vector minus real position vector of A. Meaning position vector of A with respect to ground. Okay?
This will change, this will change, so this also will change. Just differentiate it once. What will happen if you differentiate it once. What is dr by dt, velocity vector. So if you will differentiate this function once you will get okay, so I will get the famous formula of velocity vector. Relative velocity of B with respect to A is the……
Std-11, Physics, Kinematics, Ch-07 Horizontal Projectile
Second case and that is horizontal projection. From a building of H height, we have projected a particle horizontally with a velocity of u. Path followed by the particle is parabolic and the motion is projectile. We will take this direction as x and this direction as y, and g is acting downward. For this projectile we had to develop many things, time of flight, horizontal range, velocity at time t and equation of trajectory, velocity of impact with the ground. This is question of projectile motion, and is it clear. For projection motion what is the first step. We have to make a table. xy ux uy ax ay sx sy. Positive and negative we already are clear about that, how do we take that. Okay? I will ask and you answer.
ux
ax horizontal acceleration.[zero] Vertical acceleration.[g] Now should we take g or minus g?[g] We had said that we would decide the sign of acceleration and displacement, by seeing the property of motion. Is it coming down only?[yes] So displacement and acceleration both are they in the direction of motion?[yes] So, it should be taken as g. Take plus g why do you want to get into the hassle of taking minus g. minus g is not wrong, it is not wrong. Okay, now it will be made more clear. Horizontal displacement is equal to range or no?[yes] We don’t know R. What is vertical displacement?[H] Now those who are writing minus g what should they take displacement as?[Minus H] Minus H, otherwise there will be a problem, because here you wrote minus g without thinking and then you have written H here without thinking, then you will have a problem. Either take both minus or take both plus. I will take both plus because I have learnt that I should stay away from minus. See vertical motion is downwards, that is why acceleration and displacement both are in the direction of motion and it should be positive. Okay.
See, the horizontal motion and identify. Again in horizontal direction ball is moving with constant velocity. Yes or no? Any doubt? Done?
What is vertical motion? Do one work, delete horizontal motion, horizontal has disappeared. Now we just have to see what is this motion?[free fall] What is the initial velocity in free fall also?[zero] The particle was dropped with initial velocity. Will that height H drop down or no?[yes] I remember that we had written two TNT for this. If the particle is dropped with initial velocity so how much time will it take to cover the distance H?[students answering] Root of 2 Hyg, do you remember?[Yes, sir] That’s why I had told you that both the TNT was very important. See the application has now come. I had also told you one more thing. After dropping H distance the velocity…[root 2gH] Root 2gH, now you should understand yourself why I had said these things. I had told you that time that it is infinitely important for every application. Now just see what happens, see what happens in future. In every topic the application of kinematics will be there. Yes or no? So the direction of y motion we actually know this. Done? Should we do the calculations? Any doubts?
Okay, let’s go for the first part.
Can you imagine there was a question in IIT this year. In J Advanced there was a question which asked to use this formula. The range formula which we will now work on, that had to be used to give the answer. In this year IIT J Advanced. It was match the column. It is just a simple evidence to justify my statement that these all things are extremely important. Put a lot of effort in kinematics. Do the best level of efforts in physics. The one who puts in a lot of effort in kinematics will not have to put in so much of an effort in future, I am telling you, you will see.
Time of flight….
