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what needs to be addressed under this syllabus dot point? Discuss the importance of Newtons Law of Universal Gravitation in the understanding and calculating the motion of satellite

Could somebody help me with these questions or show the formulas needed to do them... either would be good, A rocket has a mass of 400kg, 75% being fuel. It develops a thrust of 8000N a) calculate its initial acceleration. b) calculate its acceleration when half its fuel has been consumed...

when you reach the option topics, are you able to choose a different option to what the teacher or class have decided to do...

(6.98x10^6)^3/T^2 = (6.67x10^-11)(5.97x10^24)/4pi^2 from this stage, what steps mathematically do you do to get to the answer.....

Would anyone be able to post a reasonable explanation for the meaning of monitoring and controlling for this dot point?.... if so please dont use a vague meaning, blending the two togehter because thats the problem im having with it.

i would like to know peoples opinions as to whether there are many difficult concepts or not in the motors & generators topic, reason being i didnt go all that well in the year 11 electricity topic...

The question is A cannonball is fired at 80ms/-1 at an angle of 45 degrees to the horizontal. Calculate the height at which the ball hits a vertical cliff 150m away. The answer is 115.5m, im clueless as how to get to this answer.