
Mechanics is the branch of applied science which deals with the bodies which are in state of rest condition or in motion. It gets classified into statics and dynamics. Statics is the branch of engineering mechanics which deals with the bodies which are in state of rest condition whereas the dynamics deals with the bodies which are in motion. Dynamics also gets divided into Kinematics and kinetics. Kinematics is the branch of dynamics which deals with the bodies which are in motion without considering the forces which has caused the motion. In this video, students will understand the basic terms related to Kinematics.
When the body is in motion at that time, velocity might be changing. The rate of change in velocity is termed as acceleration. Equations of motion are related to to uniform acceleration motion.
During a certain time interval, if the acceleration of a body is changing then it can be said as a function of either time, position or velocity. The problems associated with variable acceleration can be solved by use of differential equations.
Mechanics gets classified into statics and dynamics. Dynamics may be broken down into kinematics and kinetics. Kinematics deal with displacement, velocities and accelerations without concern for the forces involved. Kinetics deal with the forces and moments involved in making the body move along with the measurement of various parameters describing the motion. Kinematics is included which studies the motion without considering the forces which caused the motion. In this course, learner will learn the basics of Kinematics of linear motion (i.e. the motion of the object in a straight line), the difference between uniform accelerated motion and variable accelerated motion, motion under gravity in which Weight is a force and is measured in Newtons or kg m/s/s . Mass is measured in kilograms (kg) and gravity is an acceleration (m/s/s). For objects reasonably close to the Earth’s surface, gravity is approximated as 9.8 m/s/s (in some questions it may say use g=10 m/s/s). In the absence of air resistance, like in a vacuum, all objects will fall to the ground at the same rate regardless of their mass, shape and size and the problems associated with each term. Also at the last, motion diagrams are included for better graphical understanding of the terminologies. Learner is encouraged to go through the terms for better understanding of the basic concepts.