Concepts
What shape do planets take when orbiting the sun?
An ellipse
What is the velocity of an object moving 100 rpm at a radius of 10 m?
37 m/s
What is the force of a 75 kg person standing on Earth. Mass of Earth is 6 x 1024 kg and radius is 6.4 x 106 m.
735 N
How would you solve for tension of a string completely horizontal spinning an object in a circle?
Fc = mac and Fc = T. T = mac.
If the radius increases by 2, what happens to the acceleration of an object moving in a circle
Changes by 1/2
How many revolutions in a minute does an object make that travels at 15 m/s at a 3 m radius?
47 rpm
What is the force on a 900 kg satellite 100 km above the surface of the Earth? Mass of Earth is 6 x 1024 kg and radius is 6.4 x 106 m.
8520 N
Set Fg = G(m1m2)/r2 to Fg = m2*a to get a = Gm1/r2
Which planet in the solar system has the smallest period and why?
Mercury because it is the closest to the sun.
What is the acceleration of an object with an rpm of 60 and radius of 5?
197 m/s2
What is the period of a 900 kg satellite 100 km above the surface of the Earth? Mass of Earth is 6 x 1024 kg and radius is 6.4 x 106 m.
5200 seconds
How do you solve for u (coefficient for friction) when knowing radius and tangential velocity?
F = m*ac and F = uN. N = mg and ac = (vt)2/r. Final answer (vt)2/(r*g) = u
Draw all the vectors of an object moving clockwise
show me
What is the centripetal force on an object moving in a circle with tangential velocity of 50 m/s, radius of 0.75 km and mass of 50 kg?
166 N
How far above the surface of the Earth does a 1250 kg satellite need to be to have a period of 16 days? Mass of Earth is 6 x 1024 kg and radius is 6.4 x 106 m.
2.6 x 108 m above the Earth
How do you derive the period equation from all the equations you previously know?
show me