TUTORIAL#1

Part 1 ( Definitions & Basic Concepts)

 Dynamics: is defined as a branch of mechanics which deals with the motion of bodies under the action of forces .
 Kinematics : is defined as the study of motion without reference to the forces which cause motion.
 Kinetics : is defined as which relates the action of forces on bodies to their resulting motions
 Statics: is defined as a branch of mechanics which is the study the effects of forces on bodies at rest .
 Space : is defined as the geometric region occupied by bodies .
 Time: is defined as a measure of the succession of events .
 Mass: is defined as a quantity of matter in body .
 Force: is defined as the vector action of one body on another .
 Particle: is defined as a body of negligible dimension .
 Rigid Body: is defined as a body whose changes in shape are negligible and it has fixed dimension .
 Vector: is defined as the quantity that has magnitude and direction . such as " velocity , acceleration , displacement, and…..etc."
 Scalar: is defined as the quantity that has only magnitude . such as " temperature , density, …. etc."
 1st Law of Newton :
" A particle remains at rest or continues to move with uniform velocity ( i n straight line with a constant speed) if there is no unbalanced force acting on it "
 2nd law of Newton : " The acceleration of a particle is proportional to the resultant force acting on it and is in the direction of this force "
 3rd law of Newton :" The forces of action and reaction between interacting bodies are equal in magnitude , a opposite in direction , and collinear ."
 Velocity: is defined as the change in displacement per unit time . " m/s"
 Acceleration : is defined as the change in velocity per unit time . " m/s2"
 Weight : is defined as the gravitational attraction of the earth on a body .