A ball is dropped from a spacecraft revolving around the earth at a height of \(120 \mathrm{~km}\). What…
A ball is dropped from a spacecraft revolving around the earth at a height of \(120 \mathrm{~km}\). What will happen to the ball ?
It will continue to move with same speed along the original orbit of spacecraft
It will move with the same speed tangentially to the original orbit
It will fall down to the earth gradually
It will go very far in space
Solution
When ball is dropped from a spacecraft revolving around the earth at a height \(120 \mathrm{~km}\), then speed of ball is same as speed of spacecraft because orbit of ball is same as spacecraft, hence it will continue to move with same speed along the original orbit of spacecraft.