badge image

Enroll For Free Now & Improve Your Performance.

User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.

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: 12


Q1 A BALLOON IS ASCENDING VERTIcally WITH AN ACCELERATION OF .2m\sec 2 .two stones are dropped from it at an interval of 2seconds.find the distance between them 1.5 seconds after second stone is released. Q2 the velocity displacement graph of a particle moving along a straight line having negative slope which intersects the y axis(v o , v o >0) & which intersects the displacements (x o, x o >0) the the most suitable acceleration displacement graph will be what ?

11 years ago

Answers : (2)

AskiitianExpert Shine
10 Points


Ans1: Fix the datum at The initial position off the balloon and assume its velocity to be zero at that time. Therefore the first stone dropped wud move for 3.5 seconds (2 second interval + 1.5 second fall for second stone) downward with acceleration g. Therefore its displacement from the datum is

s1 = 1/2 x g x (3.5)2 .

Now, considering the second stone:

It has been dropped wen balloon is at a ht of 2a from its initial position. a= acceleration of balloon. ht = (1/2 xa x 22) = 2a .

velocity of balloon at this ht = v = ut + 1/2 a t2 . t=2 sec, u=0 . therefore v= 2a in upward direction. therefore initial velocity of second stone dropped is 2a in upward direction.  hence calculate the distance travelled by second stone in 1.5 sec by

s2= 2a(1.5) + 1/2x gx (1.5)2 .

NOW ANALYSE, whether it is above the datum or below it, then add or substract to get the distance between the two stones.

11 years ago
13 Points
Suppose you are sitting in the balloon. So you will notice that first stone takes time 1.5 sec to cover distance but second one will take 2 second more therefore time for second stone is 3.5s.
Now for first stone,
S=0.5at^2 =0.5*10*1.5*1.5=11.25
Now for second stone, 
Now S - S 2=50m.
Hope it helps😃
one year 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