Physics XI Content
Kinematics : The study of motion of bodies, does not take in to consideration the cause for motion is called Kinematics.
Rest: If the position of an object remains to be same for any length of time with respect to its surroundings, then the object will be at rest with respect to those surroundings.
Motion:If the position of a body is continuously changing with respect its surroundings with time , then the body is said to be in motion.
Displacement ( S ) : The change in the position of a body in a specific direction, is called Displacement. Displacement is a vector quantity.
Speed (v) : The distance traveled by a body in unit time is called Speed of the body. Speed is a scalar quantity.
Velocity (v) : Displacement of a body in unit time is called Velocity (or) Rate of change of displacement of a body is called its velocity. Velocity is a vector.
Acceleration due to gravity ( g ):The acceleration in a freely falling body due to gravitational force acting on it is called acceleration due to gravity. This is a vector. The value of g in C.G.S system is 980 and in M.k.s & S.I systems is 9.8 .
Freely falling body : Any object falling under the influence of gravitational force, with acceleration due to gravity is called freely falling body.
Maximum Height ( H) : The distance traveled by a body vertically projected up, just before coming to rest is called, maximum height.