Ask a Doubt
Request a call back

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

CBSE Class 9 Answered

A bullet of mass 'm' and velocity 'v' if fired onto a stationary block of mass 'M' and sticks to it. The final velocity is?
Asked by adityaahuja099 | 12 Oct, 2017, 11:30: PM
answered-by-expert Expert Answer
begin mathsize 12px style space straight u space equals initial space velcoity space straight v equals space final space velocity straight m subscript 1 equals straight m straight m subscript 2 equals straight M straight u subscript 1 equals straight v straight u subscript 2 equals 0 space left parenthesis block space is space stationary right parenthesis let space straight v subscript 1 equals straight v subscript 2 equals straight v subscript 3 space left parenthesis bullet space sticks space to space block space and space both space will space move space with space same space velocity space for space straight a space moment right parenthesis Total space Initial space momentum space of space bullet space and space block equals space Total space final space momentum space straight m subscript 1 straight u subscript 1 plus straight m subscript 2 straight u subscript 2 equals straight m subscript 1 straight v subscript 1 plus straight m subscript 2 straight v subscript 2 mv plus Mx 0 equals mv subscript 3 plus Mv subscript 3 mv equals left parenthesis straight m plus straight M right parenthesis straight v subscript 3 straight v subscript 3 equals fraction numerator mv over denominator left parenthesis straight m plus straight M right parenthesis end fraction end style
Answered by Gajendra | 29 Nov, 2017, 03:39: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Physics
boxes a and b each of mass 2 kg having dimension 20 cm to 10 cm into 8 cm and 40 cm into 30 cm and to 15 January respective at kept on a horizontal surface as shown the figure the ratio of pressure accepted by box a on the surface accepted by box be on the surface is take g 10 m per second
Asked by arushiarushi921 | 11 Oct, 2023, 08:45: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
a bus accelerates at 2m per second for first 10 second after the start and retards at 1m per second for next 10 second find the total distance covered by the bus
Asked by komalpoonia636 | 16 Jun, 2022, 02:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
The weight of a boy on the surface of earth is 294N. Find its mass.
Asked by charvi | 26 Nov, 2021, 06:27: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A block of wood is kept on a horizontal table the mass of the wooden block is 6 kg and its dimensions are 10 into 10 into 10 what is the pressure exerted by the wooden block on the table
Asked by aanchishraddha | 16 Nov, 2021, 09:27: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Unbalanced force can also change the shape,size of the body as Balanced force do
Asked by anuragyvidya | 28 Sep, 2021, 12:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A nail is driven into a wooden board by using a hammer. the impact of hammer on the head of the nail reduces the thrust of 25N. If the area of head is 0.5mm square and the tip is 0.1mm square.Find the pressure of head and tip
Asked by sreesaie2008 | 01 Aug, 2021, 06:12: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Why do bicycle begin to slow down when we stop pedaling?
Asked by bansalshally55 | 15 Aug, 2020, 05:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
acceleration
Asked by varshalifarrad | 28 Jul, 2020, 08:31: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
How to find force
Asked by vedbidi10jhs.tl | 25 Jun, 2020, 05:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
How to find force
Asked by vedbidi10jhs.tl | 20 Jun, 2020, 08:55: AM
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
×