Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

2 identical bodies are allowed to fall from different heights h1 and h2. The ratio of their momentum when they reach the ground will be?
Asked by adityaahuja099 | 29 Dec, 2017, 03:43: PM
answered-by-expert Expert Answer
When the falling object reaches the ground, Initial potential energy is completely converted into kinetic energy
 
mgh = (1/2)mv2
 
hence velocity at the ground is given by  begin mathsize 12px style v space equals space square root of 2 g h end root end style
 
hence the ratio of their momentum begin mathsize 12px style equals space square root of h subscript 1 end root space colon space square root of h subscript 2 end root end style
Answered by | 29 Dec, 2017, 04:12: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Physics
write a Newton's 2law , derive an expression for F equals to Ma
question image
Asked by vomtimittagurupriya | 29 Sep, 2023, 05:52: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
solve this problem
question image
Asked by kunaljat51 | 24 Jul, 2022, 10:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Questions 23-25 are based on the information given below. Read the information and answer the questions that follow:A bob of mass ‘m’ is suspended by a string, g be the acceleration due to gravity the bob.When the bob is stationary, the tension ‘T’ in the string is T=mg.When the bob is pulled up with an acceleration ‘a’ the tension in the string is given by T= m (g + a)When the bob is allowed to move down with an acceleration ‘a’, the tension T in the string is given byT= m (g –a)  
Asked by avishisanghai | 20 Feb, 2022, 05:19: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Define 2nd law of motion
Asked by mina.sengupta.2014 | 02 Sep, 2021, 12:49: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Which of the following events does not depend upon Newton 's third law of motion? a]flying of a bird b]Catching of a cricket ball c]walking on the ground d]recoil of a gun
Asked by rp.rath2018 | 09 Sep, 2020, 01:50: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A certain amount of force produces an acceleration of 8 M/S2 square on an object of mass 750 gram what would be the mass of another object on which the same force produces an acceleration of 12m/S2 there what acceleration this force produced if the two bodies are tied together
Asked by Hackersinghlail | 17 Apr, 2020, 09:27: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
a car of mass 800g is travelling with a velocity of 20m/s . when the brakes are applied. it stops after travelling a distance of 8m.find the retarding force and retardation 
Asked by kishor.kp14 | 24 Sep, 2019, 11:19: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
a body of mass 5kg starts and roll down 32m of aninclined plane in 4sec,find the force acting on the body
Asked by kishor.kp14 | 24 Sep, 2019, 11:16: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Why we don't hurt when we jump on muddy floor compared to hard floor 
Asked by arti.iuac | 06 Mar, 2019, 11:13: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A 4 kg block on an inclined plane is acted upon by a horizontal force of 40N as shown in the figure (please refer the image attached). The coefficient of kinetic friction between the block and the plane is 0.3. What is the acceleration of the block if it is moving up the plane?(sin37° = 0.6) A) 1.6 m/s^2 up along the plane B) 1.6 m/s^2 down the plane C) 2 m/s^2 up along the plane D) 2 m/s^2 down the plane   
question image
Asked by Rajendra | 02 Jan, 2019, 08:33: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×