Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Grade: 9

 A small block slides without friction down an inclined starting form rest. Let Sn be the distance travelled from time

t = n-1 to t = n. Then Sn/Sn+1 is -

(A)   2n-1/2n

(B)   2n+1/2n+1

(C)   2n-1/2n+1

(D)   2n/2n+1

9 years ago

Answers : (3)

AKASH GOYAL AskiitiansExpert-IITD
419 Points

Dear Shivam

S=ut+0.5at2= 0.5at2   (since u=0)

At t=n-1

S= 0.5a(n-1)2

At t=n


Sn= S'-S =0.5 [n2 - (n-1)2] = 0.5a (n-n+1)*(n+n-1)

Sn= 0.5a*(2n-1)

put n+1 in place of n in expression of Sn

Sn+1= 0.5a (2(n+1)-1)= 0.5a (2n+1)

Sn/Sn+1 = 2n-1/2n+1

option (C)


All the best.                                                           




Please feel free to post as many doubts on our discussion forum as you can. We are all IITians and here to help you in your IIT JEE preparation.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..



9 years ago
vikas askiitian expert
509 Points

a is the accleration of block then

 S = 1/2 a t2                         (using this eq)

Sn = 1/2 a [n2-(n-1)2]

     = 1/2 a [2n-1]             ...........1

Sn+1 = 1/2a[(n+1)2-n2]

         =1/2 a [2n+1]          .........2

dividing eq 1 & 2

Sn/Sn+1 = 2n-1/2n+1

9 years ago
23 Points
							Sir it is inclined plane so how do u took a=g as it is not horizontal plane So akash sir plz correct it
2 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Course Features

  • 101 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution

Course Features

  • 110 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details