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State with reasons whether the following sentences are true or falsea. If a spacecraft has to be sent away from the influence of earth’s gravitational field, its velocity must be less than the escape velocity.b. The escape velocity on the moon is less than that on the earth.c. A satellite needs a specific velocity to revolve in a specific orbit.d. If the height of the orbit of a satellite increases, its velocity must also increase. |
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Answer» State with reasons whether the following sentences are true or false a. If a spacecraft has to be sent away from the influence of earth’s gravitational field, its velocity must be less than the escape velocity. b. The escape velocity on the moon is less than that on the earth. c. A satellite needs a specific velocity to revolve in a specific orbit. d. If the height of the orbit of a satellite increases, its velocity must also increase. |
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