Introduction to the concept of trajectory A trajectory is the path followed by an object with mass in curvilinear motion (curved path) as a function of time. Mathematically ,It is defined by the equation in x-y coordinates. A famous example would be projectile motion like the ball thrown an angle or a bullet fired from […]

## Factors of 75 | Prime Factorization of 75

Number 75 is a composite number and we will find how to find the factors of 75 . We will also see technique to find out the Prime factorization of 75 easily Factors of 75 A factor of a number is an exact divisor of that number. So factors of 75 are the number which […]

## How to find work done by Multiple forces acting on a object

This can be done in these simple steps

1) First draw a free body diagram of the body showing all the forces on it.

2) Carefully choose a X-Y coordinate system so that direction of the motion or direction of force lies in X or Y direction. This will simplfy the Problem

3) Applying Newton’s law find out any unknown forces

## Revise During Preparation For Exams

You might be good at studies and have ability to learn fast , even the subjects that are considered tough like physics , mathematics, computer science e.t.c., or you might be the one struggling to learn these subjects. This article is for all those who are preparing for one exam or the another. Now once you complete understanding your topic you were studying , you move to another one and then to another one. After a week or two of continuously studying or learning new topics each day you now try to solve problems related to topic you studied two or three weeks back.

## Reverse breakdown in PN Junction

When a PN junction is reversed biased it allows very small current to flow through it. This current is due to the movement of minority charge carriers and it is almost independent of the voltage applied.

If reverse bias is made too high, the current through PN junction increases abruptly and the voltage at which this phenomenon occurs is called breakdown voltage .

## How to Calculate the force given potential energy

For one dimensional motion, the force can be found from Potential energy using following formula

## Newton’s law Interesting conceptual questions

Question: When a person walks on the floor? which direction force is applied by the person to move forward?

Question: According to Newton’s third law,each team in a tug of war pulls with equal force on the another team

What then determine which team will wins it

## Common mistake doing average speed calculation

Two most common errors you should avoid when you see an average speed question.

Mistake #1

The most common mistakes in average speed problems occurs when the question asks you to calculate the average speed of a object moving at two different speeds for different parts of the journey. Students are generally tempted to calculate the arithmetic mean (average) of the two speeds, and select a corresponding answer. This averaging approach is wrong.