OnlineCBT
Physics · WORK, ENERGY AND POWER
हिन्दीThree identical ball bearings 1, 2, and 3 are arranged on a frictionless horizontal table as shown. Ball 1 approaches balls 2 and 3 (initially at rest in contact) with velocity \( V \). If the collision is elastic, which of the following outcomes shown in Fig. 5.14 is physically possible?
Correct answer · Option 4
Case (ii)
Explanation
In an elastic collision, both momentum and kinetic energy must be conserved. For case (ii), initial \( P = mV \) and \( K = \frac{1}{2}mV^2 \); final \( P = mV \) and \( K = \frac{1}{2}mV^2 \). For cases (i) and (iii), kinetic energy is not conserved.
