Three identical sphere lie at rest along a line on a smooth horizontal surface. The separation between any two adjacent spheres is 
. The first sphere is moved with a velocity 
towards the second sphere at time 
. The coefficient of restitution for collision between any two blocks is 1/3. Then choose the correct statement
a)
The third sphere will start moving at 
b)
The third sphere will start moving at 
c)
The centre of mass of the system will have a final speed 
d)
The centre of mass of the system will have a final speed 
Three identical sphere lie at rest along a line on a smooth horizontal surface. The separation between any two adjacent spheres is . The first sphere is moved with a velocity towards the second sphere at time . The coefficient of restitution for collision between any two blocks is 1/3. Then choose the correct statement
a)
The third sphere will start moving at
b)
The third sphere will start moving at
c)
The centre of mass of the system will have a final speed
d)
The centre of mass of the system will have a final speed
Question ID - 52999 | SaraNextGen Top Answer
Three identical sphere lie at rest along a line on a smooth horizontal surface. The separation between any two adjacent spheres is . The first sphere is moved with a velocity towards the second sphere at time . The coefficient of restitution for collision between any two blocks is 1/3. Then choose the correct statement
a)
The third sphere will start moving at
b)
The third sphere will start moving at
c)
The centre of mass of the system will have a final speed
d)
The centre of mass of the system will have a final speed
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Three identical sphere lie at rest along a line on a smooth horizontal surface. The separation between any two adjacent spheres is |
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a) |
The third sphere will start moving at |
b) |
The third sphere will start moving at |
c) |
The centre of mass of the system will have a final speed |
d) |
The centre of mass of the system will have a final speed |
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(a) First sphere will take a time Now speed of second sphere will be
Hence time taken by second sphere to start motion in third sphere
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, to start motion in second sphere on colliding with it, where 
Total time 