KIDS QUIZ
SPACE EXPLORATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Momentum
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Gravity
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Will Power
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Magnetism
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Detailed explanation-1: -The escape velocity needed for a object to leave the earth’s surface overcoming the gravitational pull, is called escape velocity. It is given by: vesc=√2GMR, where: G=6.67×10−11 Nm2kg−2 is the universal gravitational constant.
Detailed explanation-2: -It has to produce a lot of thrust to escape the earth’s gravitational pull, known as escape velocity. It has to produce 3.5 million kilograms (7.2 million pounds) of thrust to do so!
Detailed explanation-3: -A spacecraft leaving the surface of Earth, for example, needs to be going about 11 kilometers (7 miles) per second, or over 40, 000 kilometers per hour (25, 000 miles per hour), to enter orbit. Achieving escape velocity is one of the biggest challenges facing space travel.