The problem involves a boy sliding down a snowy slope and questions whether the hill is frictionless, as well as the work done by friction during the slide. The scenario includes a mass of 40 kg and a height of 30 m, with the boy reaching a speed of 20 m/s at the bottom.
Some participants have provided hints regarding the comparison of mechanical energies, and one participant has calculated the work done by friction, suggesting that it is the only non-conservative force acting. However, there is no explicit consensus on the correctness of the approach, and further clarification is sought by the original poster.
There is a mention of another question regarding a satellite's orbital radius and period, indicating that the original poster is navigating multiple physics problems simultaneously.
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.