Question

( S_{n+h}=u+frac{a}{2}(2 n-1) )
( S_{n}=0+frac{-9}{2}(2 n-1) )
( S_{3-0}=0+frac{1}{2}(-9)(3)^{2} )
( 2^{2}=frac{9}{2}(2 n-1) )
( 2^{2}=2 n-1 )
( 2 n=9+1 )
( n=5 s )

# A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of: (A) 3 s (B) 5s (C) 7 s (D) 9 s natorat

Solution