Hello everyone, A few weeks ago I got a test about physics. One of the questions on the test was about a satelite that would go to an other planet, it was doing system tests in orbit, we had to tell if the satelite had weight. I understand it doesn't, because it is falling and so doesn't apply force onto anything, but it was mentioned that the satelite had an engine to fly to the other planet. It wasn't mentioned that the engine was turned on or off when the satalite was in orbit. So I filled in: The satelite is weightless when it is in space and when the engine is turned off. When the engine is turned on there is a acceleration, so there is a force acting uppon it, so it does have weight. I hope that someone can explain or confirm that this is wrong or right. Thanks already!!!