REAP 2015 – Class 2 (Introduction to Mechanics) by Prof. Vijay K. (ICTS, TIFR)


Prof. Vijay has also done REAP-Physics course in  2003-2004.

He took class on explaining basics of physics and mechanics.

Physics – Study of matter and its interaction.

2 Imp. questions:

  1. What is the world made of?
  2. How is  the world put together.

Emergence is very important concept in physics where big object is emerged from smaller components (e.g. atoms or molecule).

Can we do calculations for big object (e.g. ball, how it will move or bounce if you calculate the movement of individual components – individual atoms) from its components. This is very difficult.

Mechanics – Behaviour/Dynamics of system subjected to interaction/forces.

Kinematics – description of motion without knowing about interaction.

Then straight line motion was explained where d (distance) = v*t was plotted on different graphs.


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