| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 4 Dec 2007 22:01:42 IST
|
|
|
Please answer the following question for me........ Two particles of mass 1 kg and 2 kg respectively are initailly 10 m apart. At time t=0, they start moving towards each other with uniform speeds 2m/s and 1 m/s respectively. Find the displacement of their centre of mass at t=1s.
|
|
|
|
|
|
|
|
zero
|
this reply: 0 points
(with 0 
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Dec 2007 22:10:25 IST
|
|
|
Can u give me a detailed solution please?????
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Dec 2007 22:15:04 IST
|
|
|
rc.o.m =m1r1+m2 r2 /m1+m2
as we are considering displacement r1= 2 ,r2 =-1 ...put the values and get the desired answer
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Dec 2007 22:17:39 IST
|
|
|
see first find the velocity of centre of mass by using m1v1 + m2v2/m1+m2
...since they r moving towards each other velocities r in opp direction ...
therefore velocity of centre of mass will be 1x2 - 2x 1/
2+1
=0....since velocity of centre of mass is zero hence displacement will be 0.....nudge me if u hv any doubt
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Dec 2007 22:18:48 IST
|
|
|
Vcm = m1v1 + m2V2/m1+m2
= 1*2 - 2*1/3 { particles are moving towards eachother so one with positive sign and other with - sign)
Vcm = 0
thus centre of mass remains at rest always
|
The heights which great men reached and kept, Were not attained by sudden flight, They, whilst their companions slept, Were toiling upwards in the night.... |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Dec 2007 22:24:39 IST
|
|
|
initially m1u1 = m2u2 hence centre of mass is at rest and will be at rest after collision too.
|
---------------------------------------------------------------
- Gaurav Ragtah (spideyunlimited)
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
