. If the student had a mass of 88.6 kg, what was his weight?
F = mg = 88.6kg 9.81 m/s^2 = 869 N (3 s.f.)
The equation above is Newton's 2nd Law of Motion where g is the acceleration due to gravity near the Earth's surface.
Weight = Mass x Acceleration of Gravity
Acceleration of Gravity ≈ 9.8 m/s^2
Weight = 88.69.8 = 868.28 kgm*s^-2 = 868.28 Newtons