How to solve physics questions easily

By Gosho | 03.10.2020

how to solve physics questions easily

Physics? Oh Noes!

Jan 09,  · Solve the equations. Take your formula and try to solve for one variable at a time. Solve for each variable that is listed under the "unknown" category. Try to solve for variables that you can determine easily first%(). Online Course in Physics: a 5-step technique to solve any question about mechanics and forces (End high school physics, IB, A-LEvel, AP etc.).

This semester I started tutoring in the physics and math study center. Most of them shy away from physics problems, though, letting me — and a handful of other tutors — deal with the dreaded subject. In general, physics seems to have this aura to it that scares people before they even start solving a problem. This begins with very basic physics, but continues with higher level material. The difference seems to be that only those who like physics — and find a good way of dealing with it — stick around to deal with the higher level stuff.

Physics — and most science subjects — can be very complicated. Describing our world is not always intuitive, and sometimes requires a mathematical and conceptual understanding that is very advanced. That much can explain why not everyone goes for a physics career. That and, well, the salary. In basic physics — material covered in high school and low level university courses — the methodology is straightforward. In my experience tutoring for and taking low how to get started in interior design without degree physics classes, I have worked out a few ground rules that can help you conquer problems.

These will help whether the problem is in a homework assignment or on an exam. We will go over them now. Sounds obvious, right? You look at the question and the sentences loom at you menacingly, confusing you to no end. You have no idea where to start, even if you recognize the basic concepts. Whose cars go in which direction? What type of wave travels on the string?

Help me, you think in terror. Help me…! In lower level physics, most questions can be solved by simple formulas. As long as you remember these formulas, you are most of the way to an answer. From now on, the only thing that you need to concentrate on how to publish a book by yourself converting the horrible, confusing chunk of text into readable bits that fit into your formulas.

You can do that. What is going on in this problem? Is this a ball free-falling from some height? Figure out the context first. So you understand the physical situation now, and you know what subject this question deals with or multiple subjects. Now, read the question again, and make sure you are clear on what it actually requires you to find.

The same type of problem — say, bouncing ball — can ask you to find initial velocity, maximum height or angle of launch. Each of these will require a slightly different strategy. Make sure you know what you need to do. Another good tip to remember at this point, too, is that many physics problems have very crucial information in the wording.

A car starting from rest, for instance, means your initial velocity is zero. Two objects falling from a window might behave differently if they are both attached to one another. Word problems are confusing only because they hide the actual variables inside them. Other times, there will be variables whose purpose is revealed in a later part of the question.

Do this with all the information you get out of the question. It will also make the original, confusing text unneeded. If you organize your information, your brain will be free to deal with actual physics instead of reading comprehension. In physics, drawing a picture can really make things easier.

For example, getting a visual idea of your frame of reference, how to solve physics questions easily of the difference between up positive and down negativecan mean the difference between a right answer and a wrong one. Draw a rough schematic according to the situation. Arrows are your friends in physics questions — they show you which direction an object is moving or what the possible sum of forces applied to it are.

They organize the information for you. Use them. Some questions already come with a drawing — use it! Sometimes your professor will test your how to make a cd from mp3 files conversion skills. You have to make sure your units are the same throughout the exercise, otherwise formulas will not work. If you multiply velocity by time, you will get the distance assuming constant accelerationbut if the car moved at 10 km per hour for 5 minutes, multiplying 10 what cervix feels like in early pregnancy 5 will not give you the right answer.

Rather, you will need to either convert the kilometers per hour to kilometers per minute, or and probably easier convert 5 minutes to units of hours. The best way to do this is by fractions, but there are enough unit conversion guides out there that explain this concept. Remember not to panic, do it how to send a mass text message on iphone 4 and you will get your correct values. If we continue our example from the last part, we should convert the t final from minutes to hours.

This is true for most of physics questions, and absolutely true in the lower level physics. As a student of basic physics, you are not expected to reinvent the wheel — or even understand how the wheel was what parts of the body are affected by asthma in the first place. What you are expected to do is to understand the concepts and use the tools available to you.

I remember taking an advanced electromagnetism course where I had to memorize about 20 different formulas. At first it seemed terrible, and I kept remembering them wrong. However, the more you use the formulas, and the more you understand what they mean and — if you care enough to check — where they came from, the easier it gets to remember them. Organize your formulas in front of you. If you have a cheat sheet, align it next to your variables.

What formula can you fill up, leaving the least amount of missing variables? Which formula can help you solve the question? How do you know which one to use?? Naturally, you begin panicking again. They are derived from physical properties, and they are all interconnected.

In most physics problems, there is more than one way to reach how to solve physics questions easily solution, often meaning that more than one equation can work. In fact, in the vast majority of questions, no matter what equation you use — assuming that it is relevant to the subject matter, and that you insert the proper variables — you will reach a solution. The way to know which equation to use depends on two main issues: the variables given to you in the equation and your experience.

The more problems you solve, the more you will become familiar with strategies for picking the right formula. Until that happens, though, look for the formula that has the variable you already know from your list of variables and connects those to the one variable you are missing. If you have two missing variables, you will likely need two equations. Slow down, look at your variable list, and find the right ones.

Just remember: you might end up with a relatively lengthy equation to solve, or sometimes two or more. Keep glancing over at your list of variables. Keep the goal in mind. Solve the equations. This is a step many students skip, and then pay for. I paid for it dearly in my high school final physics exam, in fact, and I will never do it again.

Verifying results can be as easy as skimming through your equations and taking 15 seconds to think about the answer you got. What do I mean by verifying the result? If your question asks for minutes and your answer is in seconds, you missed a step.

Yeah, yeah, yeah, you think to yourself right now, I bet. What is ethical hacking ppt says it.

Practice makes perfect. Practice to become better. I sometimes get amazed looks from the students I tutor when I come up with the perfect way to solve a question they just spent half an hour trying to solve. Well, as much as my ego would love to accept this compliment, I am no genius. The reason I see the solution quickly is usually because I have experience — I did so many of these questions that I already anticipate which method would likely work best. Am I right all the time? Of course not.

Sometimes I start with one method and find it was the wrong way. The more you do them, the less time it takes you to recognize the actual effective way to solve them. Physics is less hard than you think most of the time. A man drags a box across the floor with a force of 40N at an angle.

The mass of the box is 10kg. If the acceleration of the box is 3. We said there that since the acceleration is on the horizontal, we will need to consider the horizontal force or projection of that force.

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Physics often scares people even before they take the subject or solve a physics question. It can be very complicated as it requires mathematical skills and conceptual understanding. Below are the steps to answer them. When you first read the question, it confuses you because you have no idea how and where to start. However, stay calm because as long as you know the formulas, you are on your way to answering most questions without much trouble.

Dissect the chunky questions in bits and pieces so that you can understand clearly and identify the key words or concept. Figure out the context of the question. Many a time, students tend to read the question and try to solve it without understanding it. Understand which concept the question is dealing with, read the question again and be clear about what is required for you to find.

Physics problems can be confusing as the variables are hidden within the question. Drawing what you understand will make things easier. Ensure that your units do not change throughout the whole question or certain formulas may not work. You can convert the units using fractions but there are also other ways to help guide you to understand the concepts.

As long as your variables are in the correct units, you can easily solve the questions. In Physics, you just have to understand the concepts and use the formulas taught to you. You can identify the variables given to you in the question. Find the variable required, do it step by step with no rush. It is important to read the questions carefully and verify your solutions. The only reason why one is able to solve physics problems is because of practice. Do and redo similar questions of the same concept to familiarise yourself with it.

Panicking is Not a Solution. Understand the Situation. Read the Question. Dissecting Information. Draw the Problem Out. Know your Units. Think about your Formulas.

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