Question
A BLOCK OF WOOD IS KEPT ON THE FLOOR OF A STATIONARY ELEVATOR. D ELEVATOR BEGINS TO DESCEND WITH AN ACCLN 12m/s2 . IF g =10 , THEN DISPLACEMENT OF BLOCK W.R.T. GROUND DURING FIRST 0.2 SEC. AFTER D START WILL BE ??
ANS 0.2m
Joshi sir comment
s = ut + 1/2 at2
so s = 0 + 1/2 10(0.2)2
so s = 5(0.04) = 0.2
since elevator is moving with an acc. greater than g so we should take it a free fall