List- I (Layer of atmosphere) | List- II (Approximate height over earth's surface) | ||
A. | F1-Layer | I. | 10 km |
B. | D-Layer | II. | 170-190 km |
C. | Troposphere | III. | 100 km |
D. | E-layer | IV. | 65-75 km |
A body of mass 1000 kg is moving horizontally with a velocity of 6 m/s. If 200 kg extra mass is added, the final velocity (in m/s) is: