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fa08ti
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the Earth has a mass of 5.98 x 10^24 kg and the moon has a mass of 7.35 x 10^22 kg. the distance from the centre of the moon to the centre of the Earth is 3.84 x 10^8m. a rocket with a total mass of 1200kg is 3.0 x 10^8 m from the centre of the Earth and directly in between the Earth and the moon. find the net gravitational force on the rocket from the Earth and moon.
ATTEMPT
ok so i used Fnet=( (Gm1m2)/r^2) + ( (Gm2m3)/r^2)
m1 would be the mass of earth, m2 is the mass of the rocket and m3 is the mass of the moon
what I'm confused about are the r values. for the first one i used 3.0 x 10^8 and for the second r value is subtracted 3.0 x 10^8 from 3.84 x 10^8m. is that correct?
i got a big number for the answer (2.30 x 10^9 N) so i want to make sure i understand how to do this
ATTEMPT
ok so i used Fnet=( (Gm1m2)/r^2) + ( (Gm2m3)/r^2)
m1 would be the mass of earth, m2 is the mass of the rocket and m3 is the mass of the moon
what I'm confused about are the r values. for the first one i used 3.0 x 10^8 and for the second r value is subtracted 3.0 x 10^8 from 3.84 x 10^8m. is that correct?
i got a big number for the answer (2.30 x 10^9 N) so i want to make sure i understand how to do this