Recent content by lempkema

Homework Statement When the motor shown in the figure raises the m = 1050 kg mass, it produces a tension of 1.42×104 N in the cable on the right side of the pulley. The pulley has a moment of inertia of 79.8 kgm2 and a radius of 0.440 m. The cable rides over the pulley without slipping...

thank you so much, that made to ratio a lot less difficult to apply!

Homework Statement Planets X & Y travel in circular orbits around the same star. The ratio of the radii of their orbits is 5:2. 5 years after the planets were aligned, planet x has rotated 92.6 degrees. how many degrees has y traveled in the same amount of time? Homework Equations...

haha i mean (4pi^2/(G*(4/3)*pi*density))

or it would give me: T^2=(4pi^2/(G*density*(4/3pi)*r^3))*r^3, which is T^2=(4pi^2/(G*density)) thank you so much, i think I've got it from here :)

that would give me: T^2=(4pi^s/(G*(Density*v))*r^3 but that would give me three unknowns instead of just two. i just feel like i need more information to solve this problem.

Homework Statement A satellite is in orbit very close to the surface of a spherical planet. The orbital period is 2.58 hours. What is the density of the planet? Assume the planet has a uniform density. Homework Equations T^2=(4pi^2/GM)*r^3 Density=m*v The Attempt at a Solution...