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3. | A ball is dropped from a spacecraft revolving around the earth at a height of 120km. What will happen to the ball? | |
A. | It will go very far in the space | |
B. | It will move with the same speed tangentially to the spacecraft | |
C. | It will fall down to the earth gradually | |
D. | It will continue to move with the same speed along the original orbit of the spacecraft | |
Answer: Option D | |
Explanation: | |
In the absence of external torque the ball will continue to move with the same speed along the original orbit of spacecraft. |
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