Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ruby negi
a body keep in a ground is not a action reaction case.. action and reaction always acts on different objects.. body places in ground is equilibrium case where two forces balance each other(normal force balance it's weight)
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