Physics
Grade-10
Easy
Question
When a spacecraft is revolving around the Earth, if a ball is dropped from it, then what will happen to the ball?
- It will move with the same velocity v along the original orbit of the spacecraft
- It will move along with the spacecraft tangentially at the same speed
- It will fall to the Earth gradually
- It will go into space
Hint:
The ball will be in a condition of weightlessness.
The correct answer is: It will move with the same velocity v along the original orbit of the spacecraft
When ball is dropped from a spacecraft revolving the earth, Speed of ball is same as speed of spacecraft because ball is in same orbit. As the ball possess same initial tangential speed as that of space craft. So, it also feels the condition of weightlessness.Since no external torque is applied, therefore, according to law of conservation of angular momentum, the ball will continue to move with the same angular velocity along the original orbit of the spacecraft.
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