The discussion focuses on a physics problem involving a boy sliding down a 30 m high snowy slope with a mass of 40 kg, reaching a speed of 20 m/s at the bottom. The work done by friction was calculated using the equation Wnc = Ef - Ei, resulting in -3760 J, confirming that friction was present during the slide. Additionally, a separate question regarding the relationship between orbital radius and period for a satellite was raised, indicating a need for further exploration of gravitational equations.
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Yes, that's the work done by friction. That's all you need.flynostrich08 said:ok so i enter Wnc= Ef-Ei which = (1/2mvfinal^2 + mgh)-(1/2mvintial^2+mgh)=-3760 is that the work of friction then since friction is the only nc force? or is there another equation to solve for from there.
You've already started a thread on that new problem (https://www.physicsforums.com/showthread.php?t=410242). See my comments there.flynostrich08 said:i have another question i need help with that i posted and can't get an answer to. if you don't mind-A satellite is orbiting above the earth. By what factor must the orbital radius be changed in order to double the period of the orbit?
I have to solve for two variables T-period and r-radius of satellite but i can't solve for two variables if they are both in the same equations.