Learn with Rashmi Class-8

Distance          The distance covered by a moving body is the length of path covered by the body. In SI system,             distance is measured in metre (m). It is a scalar quantity as it has only magnitude but no direction.  Displacement             The shortest distance covered by a moving body in a fixed direction is called displacement. In SI             system, it is measured in metre (m). Displacement is a vector quantity as It has both magnitude                and direction.

 

 1 second is defined as (1/86400) part of one solar day.

  The duration between any two events is called time.

 

 The weight of a body is defined as the force with which it is pulled towards the center of the earth or a planet.