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# I NEED HELP~ ACTIVITY 4 Activity 4: Newton's Law of Gravity: The force of gravity between...

I NEED HELP~ ACTIVITY 4 Activity 4: Newton's Law of Gravity: The force of gravity between any two objects of masses mi and m2, separated by a distance of r is given by Gmm 1. Calculate the average gravitational pull on Pluto (use r - semi-major axis). 2. Approximate Pluto's orbit to a circle (with radius semi-major axis) and determine Pluto's tangential speed using what you know about rotational motion. How does this value compare with the values you found in Activity 3 (#4) above? 3, Adhit s Clecd our mnee ow n s pat e 1. Go to Kepler's Laws Simulation Site: http://astro.unleduhaap/pos/animations/kepler.html In orbital Settings, select"Pluto" from drop down and click "OK" In Animation Controls, maximize the animation rate and click "Start Animation" In the lower left corner, look through the tabs for each of Kepler's Laws and Newtonian · . . Features. You should be able to compare your answers to those in the simulation. 2. Check out this site on the Super Massive Black Hole in the center of the Milky Way Galaxy http:/www.phy duke.edu/-kolena/mwbha.html. This is a good example of how Astrophysicists put Kepler's Laws and Newton's Law of Universal Gravity to work.

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