Verified Solution • 2025–26 Session moderate

QNEET-2021-Ph-641: NEET 2021 Physics - Class 11 NEET-2021-Ph-641 Solution: A small block slides down on a smooth inclined plane starting…

A small block slides down on a smooth inclined plane starting from rest at time t = 0. Let SnS_n be the distance travelled by the block in the interval t=n−1t = n-1 to t=nt = n. Then the ratio SnSn+1\frac{S_n}{S_{n+1}} is: 2n−12n\frac{2n-1}{2n} 2n2n−1\frac{2n}{2n-1} 2n+12n−1\frac{2n+1}{2n-1} 2n−12n+1\frac{2n-1}{2n+1}

Multiple Choice Options

  • A 2n2n−1{{2n} \over {2n - 1}} 2 n _ 1 2 n _
  • B 2n−12n{{2n - 1} \over {2n}} 2 n 2 n _ 1 _
  • C 2n−12n+1{{2n - 1} \over {2n + 1}} 2 n + 1 2 n _ 1 _
  • D 2n+12n−1{{2n + 1} \over {2n - 1}} 2 n _ 1 2 n + 1 _

Step-by-Step Verified Solution

S n S n + 1 = a 2 ( 2 n _ 1 ) a 2 ( 2 ( n + 1 ) _ 1 ) = 2 n _ 1 2 n + 2 _ 1 = 2 n _ 1 2 n + 1

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