The escape speed from the surface of the Earth is 11.2 km/s. Estimate the escape speed for a spacecraft from the surface of the Moon. The Moon has a mass 1/81 that of Earth and a radius 0.25 that of Earth. O 5.57 km/s 8.20 km/s 3.62 km/s O 7.60 km/s 6.67 km/s 2.49 km/s 4.56 km/s O 1.78 km/s

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Units and Dimensions

These are generally defined as the terms which precede or describes the dimensions further. These are also further divided into two parts namely fundamental units and the derived units.