Ask Questions From NCERT:

 Sol.) The total distance covered by Shyam

                                                        =AB+BC+CD+DE+EF

                                                        =(1+2+1+2+2)Km = 8 Km

        The magnitude of displacement of Shyam

                                                          = AF = 5 Km

        The magnitude of displacement is less than the distance covered by him.

-Answered by Aman Senapati On 31 May 2020:10:02:26 AM

1. Displacement during a given time is the shortest distance measured from initial position of the object.
2. Displacement is characterised by its magnitude as well as direction. Thus,displacement is a vector.
3. Displacement can be positive or negative or even zero.

-Answered by Aman Senapati On 31 May 2020:09:40:08 AM

1. Distance is the total path length covered by an object during a given time.
2. Distance has a magnitude only and no direction.Thus,distance is a scalar.
3. Distance is always taken positive. 

-Answered by Aman Senapati On 31 May 2020:09:44:50 AM

 Objects,which are stationary and do not change their positions with time are, said to be at rest.

-Answered by Aman Senapati On 31 May 2020:09:24:55 AM

 An object is said to be in motion when its position changes with time.

-Answered by Aman Senapati On 31 May 2020:09:23:53 AM

 Douglas Engelbart was the inventor who made the first computer mouse.

-Answered by Aman Senapati On 31 May 2020:09:37:50 AM

Creeper System was the first computer virus which was made in U.S.A.

-Answered by Aman Senapati On 31 May 2020:09:34:41 AM