Recent content by fiestytig

Aha! I figured it out! Thanks. Had to use a formula to find mass and then use g = G+M/R^2 to find R. :)

So then how do I find the radius of the planet? (I got confused by the radiuses there for a minute.)

I'm afraid I still don't follow, even with those suggestions... All I really know is T^2=4 Pi^2 r^3 /G M. But I don't really have the r either, do I?

Here's my problem: A 23.0-kg satellite has a circular orbit with a period of 2.35 h and a radius of 8.90×106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 8.90 m/s2, what is the radius of the planet? I got to say, I...

Nobody wants to play with friction tonight? :(

My second question that I need help with: In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.90 m by the horizontal 25 N force from the broom and...

Here's my first question: A 3.3 kg block is pushed along a horizontal floor by a force F of magnitude 20 N at an angle = -40°. The coefficient of kinetic friction between the block and floor is 0.25. (a) Calculate the magnitude of the frictional force on the block from the floor. (b)...