Question

4. A body starts from rest and moves
with uniform acceleration. The ratio
of the distance covered in n seconds
to the distance covered in the nth
second is
O 2n2/n-1(2n-1)
O2n2/2n-1(2n-1)
O n2/n-1
O n2/2n-1​

Answer 1

Explanation:

here u=0,a=a,t=n

s=ut+1/2at²

S=1/2an²

Sn=u+a(n-1/2)

Sn=a(2n-1)/2

S/Sn=(an²/2)/a(2n-1)/2

=(an²/2)×2/a(2n-1)

=n²/2n-1