Mechanics / Electrodynamics
May 1, 2021
There numerous applications of 335 years old Newton’s Third Law of Motion. But most of the applications taught in text books are qualitative in nature. These applications include rebounding of ball, recoil (backward push) of gun when bullet is fired, recoil (backward push) of gun when bullet is fired, backward motion of boat in water when person jumps from it towards shore, book remains stationary on the floor or table, forward motion of swimmer in river, rowing of boat, flying birds in atmosphere, movement of fireworks etc. The bouncy, super and sky balls, table tennis balls, ping pong balls offer highly elastic collisions. Also, the motion of rockets is explained on the basis of Newton’s third law of motion, where motion of aero plane, fighter planes (F16) etc. is not explained on the basis of Newton’s third law of motion. Can aero planes, fighter planes can reach in space (start from Kerman line) 100km above the surface of the earth. In fact, elementary principle of rocket discovered about 1000 years before and scientists improved the same step by step. However, first motor-operated airplane was discovered by Wright brothers in 1903. Now one can try to send the motor-operated plane to reach space. It may be cheaper proposition if realized in actual practice.