### Equation of the Path of a Projectile

Different equations used in projectile motion to calculate time of flight, horizontal range, maximum height etc.

Let
O = Point of projection,
u = Velocity of projection, and
Î± = Angle of projection with the horizontal.

Consider a point P as the position of particle, after time t seconds with x and y as co-ordinates, as shown in Fig. 1.30.

The equation of the path of a projectile or the equation of trajectory is given by

Since this is the equation of a parabola, therefore, the path traced by a projectile is a parabola. The following are the important equations used in projectiles:

1. The time of flight (t) of a projectile on a horizontal plane is given by

2. The horizontal range (R) of a projectile is given by

For a given velocity of projectile, the range will be maximum when sin 2Î± = 1 or Î±=45.

3. The maximum height (H) of a projectile on a horizontal plane is given by

4. The time of flight of a projectile when it is projected from O on an upward inclined plane as shown in Fig. 1.31, is given by

where Î² is the inclination of plane OA with the horizontal.

When the projectile is projected on a downward inclined plane, then

5. The range of projectile when it is projected from O to B on an upward inclined plane, as shown in Fig: 1.31, is given by

For a given velocity of projectile, the range will be maximum when

When the projectile is projected on a downward inclined plane, then

### Are Engineers Favourite Among Girls?

What do girls think about men who are engineers and what type of engineers are most favourite among girls? A survey was conducted by a team of aboutmech with members chosen from different countries. Each team member carried out a neutral survey in his/ her country to evaluate what females think about most of the engineers from different engineering branches. An overview of different questions asked in survey is given below:

Question: Which male engineers do you find more attractive as a husband?
Almost 50% women voted for mechanical engineers to be the most attractive husbands among other engineers. So mechanical engineers are most favourite among girls as a husband. They find them more trustworthy, intelligent, and creative. A married women from California said, “If your husband is a mechanical engineer, he will help you in everyday tasks. Because mechanical engineers are good team players and they have creative ideas about everything.”

### Best CV Format for Mechanical Engineers

Fifty percent engineers fail to grab a dream job because of basic faults in their CVs/ Resume. This article tells you about best CV format for mechanical engineers and how you are supposed to design your CV when applying for jobs. You CV is your first impression on future employer. He/ she does not know you. Your CV is the only representation of your personality. He/ she may select or reject you after first glance on your resume.
I have experienced shortlisting and interviewing candidates for different jobs. I was astonished to learn that most of the candidates simply copy paste each others CVs without any changes at all. These types of CVs are rejected immediately. I am not trying to tell you that you should avoid copying, rather i ma telling you to refrain from giving your CV to your friends.
An ideal CV consists of following portions:
Name/ Address of the applicantObjectiveEducation RecordEmployment HistoryProfessional SkillsAwards & AchievementsCo-Curricular Activities/ Inter…

### Engineering Mechanics - Introduction

The Engineering Mechanics is that branch of Engineering-science which deals with the principles of mechanics along with their applications to engineering problems. It is sub-divided into the following two main groups:

(a) Statics, and (b) Dynamics

The Statics is that branch of Engineering Mechanics which deals with the forces and their effects, while acting upon the bodies at rest.

The Dynamics is that branch of Engineering Mechanics which deals with the forces and their effects, while acting upon the bodies in motion. It is further sub-divided into the following two branches:

(i) Kinetics, and (ii) Kinematics

The Kinetics is that branch of Dynamics, which deals with the bodies in motion due to the application of forces.

The Kinematics is that branch of Dynamics which deals with the bodies in motion without taking into account the forces which are responsible for the motion.