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With reference to the suborbital flights, consider the following statements:
1. They will not be travelling fast enough to orbit Earth once they reach the “edge of space”.
2. It allows space travellers to experience a few minutes of “weightlessness”.
Which of the statements given above is/are correct?
  • a)
    1 only
  • b)
    2 only
  • c)
    Both 1 and 2
  • d)
    Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
With reference to the suborbital flights, consider the following state...
Virgin Group founder Richard Branson and five others undertook a brief trip to the “edge of space”, taking off on the VSS Unity spaceship from New Mexico and reaching an altitude of 85 km from Earth before returning. Such a trip is called a “suborbital flight”.
  • When an object travels at a horizontal speed of about 28,000 km/hr or more, it goes into orbit once it is above the atmosphere.
  • Satellites need to reach that threshold speed in order to do orbit Earth. Such a satellite would accelerating toward the Earth due to gravity. However, it moves fast enough that the Earth curves out from under it as fast as it falls, giving it a circular path.
  • Any object travelling slower than 28,000 km/hr must eventually return to Earth. However, Branson’s spacecraft travelled fast enough to reach a point far enough to be considered outer space.
  • These are suborbital flights, because they will not be travelling fast enough to orbit Earth once they reach the “edge of space”.
  • Such a trip allows space travellers to experience a few minutes of “weightlessness”.
  • If an object travels at 40,000 km/hr, it will achieve what is known as “escape velocity”, and never return to Earth.
  • Hence both statements are correct.
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With reference to the suborbital flights, consider the following statements:1. They will not be travelling fast enough to orbit Earth once they reach the “edge of space”.2. It allows space travellers to experience a few minutes of “weightlessness”.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
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