i. gripped the imagination of: received much attention
ii. dawned upon: realised it for the first time
iii. ushered in: began the new idea
iv. passed into current coin: have been brought into use
v. passport of the future: a thing that makes something possible or enables one to achieve it, authorization of growth
Two identical ball bearings in contact with each other and resting on a frictionless table are hit head-on by another ball bearing of the same mass moving initially with a speed V. If the collision is elastic, which of the following (Fig. 5.14) is a possible result after collision ?
