[Physics] Need help with the law of gravity?
Good day,
I need a little help understanding the following question. Please address the individual points in detail in your answer (1.: …, 2.: …, 3.: …, …).
- How do we know that in part a) we can equate the gravitational force with the force of weight?
- I remember that this is only possible if the other object is directly on the surface of the Earth, is that correct?
- But this is not obvious in this task, is it?
- Please explain task 1 with parts a) and b) in as much detail as possible so that everyone can understand it. That would really help me a lot.
I look forward to your answers.
Task:
Solution to the task:
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LG H.
Normally, the formula character d is always considered as a diameter. What do I recognize here is that here the distance between earth and moon is meant by the “d”? What does “d” mean in this case as a word? Normal diameter, but here?
Distance
Well, the weight force is caused by gravity, so is the same.
Good idea. The weight force contains the falling acceleration and this decreases with the height. In this case, however, it is specified, so it will fit.
Exactly, that is not obvious, you have to come to the idea of looking at such an object near the earth’s surface.