A scientific probe lands on several different planets, all of which have the same mass density ρ but differ in radius r. They measure the acceleration due to gravity g on the surface of each planet. Which of the followings shows a graph that can be used to determine an experimental value for the Universal Gravitational Constant G and an explanation of how to determine this value?

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)