| airship flagship lightship |
Airship: It is a self-propelled lighter-than-air aircraft with the means of controlling the direction of the flight.
Flagship: It is a ship carrying the flag officer or the commander of a fleet, or squadron. It displays the officer’s flag.
Lightship: It refers to a ship anchored in a specific location flashing a very bright light for the guidance of ships to avoid dangerous areas.
| take on sth: | to begin to have a particular quality or appearance; to assume sth |
| take sb on: | to employ sb; to engage sb to accept sb as one’s opponent in a game, contest or conflict |
| take sb/sth on: | to decide to do sth; to allow sth/sb to enter e.g. a bus, plane or ship; to take sth/sb on board |
Figure 8.9 shows the strain-stress curve for a given material. What are (a) Young’s modulus and (b) approximate yield strength for this material?

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 ?
