Two particle 
and 
, initially at rest, move towards each other under a mutual force of attraction. At the instant when the speed of 
is 
and the speed of 
is 
, the speed of the centre of mass of the system is
a)
b)
c)
d)
Zero
Two particle and , initially at rest, move towards each other under a mutual force of attraction. At the instant when the speed of is and the speed of is , the speed of the centre of mass of the system is
a)
b)
c)
d)
Zero
Question ID - 100300 | SaraNextGen Top Answer
Two particle and , initially at rest, move towards each other under a mutual force of attraction. At the instant when the speed of is and the speed of is , the speed of the centre of mass of the system is
a)
b)
c)
d)
Zero
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Two particle |
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a) |
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b) |
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c) |
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d) |
Zero |
1 Answer
127 votes
Answer Key / Explanation : (d) -
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(d) We know that
We consider the two particles in a system.Mutual force of attraction is an internal force. There are no external forces acting on the system. From Eq.(i), we get
Since initial |
(i)
therefore, final
127 votes
Answer Link
127