During a solar eclipse, when the moon is between the earth and the sun, the gravitational pull of the moon and the sun on a student are in the same direction.

(a) If the pull of the earth on the student is 800 N, what is the force of the moon on the student?

(b) What is the force of the sun on the student?

(c) What percentage correction due to the sun and moon when they are directly overhead should be applied to the reading of a very accurate scale to obtain the student’s weight?