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:…
Compound Pendulum
When a rigid body is suspended vertically and it oscillates with a small amplitude under the action of force of gravity, the body is known as compound pendulum, as shown…
D-Alembert’s Principle
What is D-Alembert's Principle in Engineering Mechanics? Consider a rigid body acted upon by a system of forces. The system may be reduced to a single resultant force (P) acting…
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 α = Angle…
Center of Percussion / Oscillation
Sometimes, file center of oscillation is termed as center of percussion. It is defined as that point at which a blow may be struck on a suspended body so that the reaction at the…
Couple – Moment of a couple
What is definition of Couple in engineering mechanics? Define moment of a couple? The two equal and opposite forces, whose lines of action are different, form a couple, as shown…
Effort Required to Move the Body on an Inclined Plane
Effort Required to Move the Body Up an Inclined Plane The effort (P) required to move the body up an inclined plane as shown in Fig. 1.20, is given by where W…
Projection & Motion Important formulas
Projection: Projectile fired at an angle with Horizontal: Time of flight: It is the time taken by the projectile to return to ground, or the time for which the projectile remains…
Motion of a man in a lift
Case (1): When the lift is accelerated upward: Suppose, ‘R’ be the upward thrust of the floor on the man (normal reaction) and ‘mg’ is the weight of the man acting downwards. Hence,…
Angle of Repose
Angle of Repose - Where the angle of inclination (α) of the plane is equal to the angle of friction (ϕ). It is the angle of inclination (α) of the…
