(a) how far is the center of mass of the earth-moon system from the center of the earth? (appendix c gives the masses of the earth and the moon and the distance between the two.) m
(b) express the answer to (a) as a fraction of the earth's radius.'

a)

b)r_cm = 0.733 R_{earth}

Explanation:

Location of center of mass of Earth- moon system is

=4.672×10^(6) m

a)

b)

therefore

r_cm = 0.733 R_{earth}

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.