Flag Mechanics> Three identical balls are placed on a fri...
question mark

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed on the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equillibrium.

Aman Kashyap , 8 Years ago
Grade 11
anser 1 Answers
Ansh Goyal

Last Activity: 6 Years ago

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. So correct option is B.
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. So correct option is B. 
 
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments