+91-85588-96644 - or - Request a Call

Keep me logged in
You can't leave Captcha Code empty
By submitting this form, you agree to the Terms & Privacy Policy.
OR

Tests given

OR

Problem Solving Tactics in Physics (Motion in One Dimension)

Have you ever experienced this dichotomy: “I know the concepts, but I find it difficult to solve the problems”? This is not just the case with you. Most of the students are well versed with the theoretical concepts in physics, but they falter, when it comes to problem solving.  Relax! Not a big issue. You are at the right place and since you are reading this post, I am sure that you are a motivated kid and want to improve. This is enough to do the trouble-shooting.

In this entry, we will try to understand the common hurdles that are detrimental to your score, while solving complex Physics problems. For this entry, we will just concentrate on the topic Motion in One Dimension.

Tactic 1: Do You Understand the Problem?

For beginning problem solvers, no difficulty is more common than simply not understanding the problem. The best test of understanding is this: Can you explain the problem in your own words?

Let’s try out one problem:

You drive a pick-up truck along a straight road for 8.4 km at 70 km/h, at which point the truck runs out of gasoline and stops. Over the next 30 min, you walk another 2.0 km farther along the road to a gasoline station.

What is your overall displacement from the beginning of your drive to your arrival at the station?

What is the time interval ?t from the beginning of your drive to your arrival at the station?

What is your average velocity Vavg from the beginning of your drive to your arrival at the station?

Find it both numerically and graphically.

In the above problem, the given data allow you to find your net displacement ?x in part (a) and the corresponding time interval ?t in part (b). Also, in part (c) the unknown is your average velocity Vavg. So, it’s important to identify the unknown and to find the connection between the unknown and the known data.

Here, the connection is Vavg =   ?x /?t

Tactic 2: Are the Units OK?

Be sure to use a consistent set of units when putting numbers into the equations. In the above problem, the logical units in terms of the given data are kilometers for distance, hours for time intervals, and kilometers per hour for velocities, you may sometimes need to make conversions.

Does your answer make sense? Is it far too large or far too small?

Is the sign correct? Are the units appropriate? If the answer is no, go back and check.

For example in part (C) of above problem, the correct answer is 17km/hr. if you find 0.00017 km/h, -17 km/h, 17 km/s, or 17,000 km/h, you should realize at once that you have done something wrong. The error may lie in your method, in your algebra, or in your number calculation.

Keep visiting TCYonline.com for more tips and tricks on exam prep.

Remember, we at TCY are committed to your success.