PHYSICS HELP! Force of Gravitational Attraction

Question

1. Determine the force of gravitational attraction between the earth ( which is 5.98 x 10^24 kg ) and a 70 kg physics student if the student is standing at sea level, a distance of 6.40 x 10^6 meters from earth's center. do not round your answer at all.
2. Determine the force of gravitational attraction between the earth ( m= 5.98 x 10^24 kg ) and a 70 kg physics student if the student is in an airplane somewhere above earth's surface. this would place the student a distance of 6.41 x 10^6 meters from earth's center. do not round your answer at all.

Answer 1

Newton's law of universal gravitation is what your looking for:

F = G (m₁.m₂) / r²

Where the gravitational constant G ≅ 6.674 × 10⁻¹¹ m³ kg^-1 s^-2

(source: https://physics.nist.gov/cgi-bin/cuu/Value?bg|search_for=universal_in! or just wikipedia)

Plug in the mass of the earth and the student (m1 and m2) and the distance 'r' along with G.

Your answers should be close but lower than 700 N (10 x 70).