Hey, I'm new to these forums (duh! ) and need some help; we have a physics portfolio containing 10 questions of varying difficulties. I'm having some troubles with some of the questions and wouldn't mind some help to guide me in the correct direction! So I'd be grateful if anyone aids me with this. The question is: 7. Draw graphs to show relationship between a) FORCE and ACCELERATION for an object in circular motion. b) MASS and DISTANCE for forces due to gravitation. c) The PERIOD of orbit of a satellite and its ALTITUDE. Indicate correct units and symbols of the quantities when labelling the axes for each. Well, for part a, I think the graph would have acceleration at the horizontal axes and Force on the vertical axis. The line would probably be straight, but i'm not sure if an object in circular motion changes acceleration at different parts. Part b, I think it'd be a straight line because an object wouldn't move unless acted upon by another object. Mass on the vertical axis, distance on the horizontal axis. Part c, as the satellite gets closer to eath, it becomes faster. Therefore it spends less time at the lower altitudes. So it'd be like a y=x^2 graph with period on the vertical axes and altitude on the horizontal axis. So yup, help me out! thanks !