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Grade: 11
Three identical balls are placed on a frictionless horizontal surface touching each other they stick to each other because of aggressive another ball of same radius and mass M is placed over the white created by three balls find the force applied by the balls kept on the floor to each other if the system remains in equilibrium
one month ago

Answers : (2)

23746 Points
As ball B moves towards ball C, so first collision is between ball B and C.
After collision
let vB and vC is speed of ball B and C and are given as vB=(mB−mcmB+mc)vvc=(2mBmB+mc)v     As mc=4mb that is  mc>4mb
from above equations we can say that  has negative signthat after this collision ball B will move in opposite direction towards ball A and ball C will move in right hanTherefore, ball B will make another collision with ball AHence in this case there will be two collisions.
one month ago
Vikas TU
10366 Points
Dear student 
horizontal surface
center one of the balls
line joining centers of any two balls
point of intersection of medians
Good Luck 
29 days ago
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