BhardwasTutorials

  Motion:  Movement of any object from one position to another position with respect to the observer is called as Motion. Motion Along a Straight Line: When an object moves along a straight line, the motion of the object is called rectilinear motion. For example; motion of a car on highway.  Vectors and Scalar Quantities:  Vector is a quantity which has both magnitude and direction. For example, Force, position, etc. Scalar is a quantity with which direction is not associated. For example, Mass, temperature, time, etc.  Distance:  Length of path covered by a moving an object in the given time irrespective of the direction is called distance. It is a scalar quantity. Its SI unit is metre(m). Displacement:  The shortest distance measured from initial to the final position of an object is known as the displacement. It is a vector quantity.  Uniform Motion:  When an object covers equal distances in equal intervals of time, it is said to be in uni...

  Velocity (v):  Speed of an object in a particular direction is named as velocity, i.e., it is the displacement of body in unit time. It is a vector quantity.  Average velocity : It is given by the arithmetic mean of initial velocity and final velocity for a given period of time. Acceleration (a) : The rate of change of velocity is termed as acceleration. Its SI unit is metre/seccond2 (m/s2). It is a vector quantity. The acceleration is taken to be positive if it is in the direction of velocity and negative when it is opposite to the direction of velocity.  Negative acceleration  is also named as retardation or deceleration. An object moving on a circular path though with uniform speed, is always said to be accelerated as it changes its direction every moment.  Uniform acceleration:  When velocity of body changes by equal amounts in equal time intervals, acceleration is said to be uniform. For example: Motion of a freely falling ball. Non - uniform ac...