- #1
JoeyBob
- 256
- 29
- Homework Statement
- See attached
- Relevant Equations
- F=mg, F=-GmM/r^2
I know its something to do with my unit conversions because my answer is the right numbers but too small by a factor of 10000.
I convert the radius to meters by multiplying it by 1000. I convert the density to kg/m^3 by dividing it by 10.
I find the volume using the equation (4/3)*pi*radius^3
I find the mass by multiplying the volume by the density.
I find the force of gravity by using GMm/(radius planet+distance from planet)^2
(distance was also converted to m by multiplying it by 1000)
Fg=ma, the small masses cancel.
I get an answer that has the right numbers but is too small by a factor of 10000.
I convert the radius to meters by multiplying it by 1000. I convert the density to kg/m^3 by dividing it by 10.
I find the volume using the equation (4/3)*pi*radius^3
I find the mass by multiplying the volume by the density.
I find the force of gravity by using GMm/(radius planet+distance from planet)^2
(distance was also converted to m by multiplying it by 1000)
Fg=ma, the small masses cancel.
I get an answer that has the right numbers but is too small by a factor of 10000.