science
Grade8
Easy
Question
Which of the following can possibly be done to make an object revolve around the Earth in a particular orbit?
(a) Launch it at a sufficiently high velocity
(b) Launch it from a high altitude
(c) Launch it from the ground
- All are correct
- Only (b) and (c)are correct
- Only (a) and (b) are correct
- Only (a) is correct
Hint:
The object should reach near the earth's orbit.
The correct answer is: Only (a) and (b) are correct
Here the correct option will be 'C' i.e; both a and b. This is because to make an object revolve around the earth it must be thrown at a sufficiently high velocity from a well-defined high altitude just like spacecraft. If it a not thrown at the above-mentioned criteria it will never reach the purview of the earth's orbit.
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