Two identical balls B and C, in contact with each other and at rest on a horizontal friction less table, are hit head-on by another identical ball A moving initially with a speed v as shown in fig. (3). What is observed, if
the collision is elastic ?

Question

Two identical balls B and C, in contact with each other and at rest on a horizontal friction less table, are hit head-on by another identical ball A moving initially with a speed v as shown in fig. (3). What is observed, if

the collision is elastic ?

Infinity Learn · Accepted Answer

Here we apply the law of conservation of energy. If m be the mass of each ball, then K.E. before collision $$=12mv2$$ case (a). After collision, kinetic energy of the system $$=0+12mv22+12mv22=14mv2$$  case (b). $$=0+0+12mv2=12mv2$$  case (c). $$=12mv32+12mv32+12mv32$$ $$=16mv2$$  case (d). $$=0+0+0=0$$ Hence case (b) is the only possible result.

Two identical balls B and C, in contact with each other and at rest on a horizontal friction less table, are hit head-on by another identical ball A moving initially with a speed v as shown in fig. (3). What is observed, if
the collision is elastic ?

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Two identical balls B and C, in contact with each other and at rest on a horizontal friction less table, are hit head-on by another identical ball A moving initially with a speed v as shown in fig. (3). What is observed, ifthe collision is elastic ?

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Ready to Test Your Skills?

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Two identical balls B and C, in contact with each other and at rest on a horizontal friction less table, are hit head-on by another identical ball A moving initially with a speed v as shown in fig. (3). What is observed, if
the collision is elastic ?