Answer:
a) F =489.95 N
b) W = 490 N
c) both have same value
Step-by-step explanation:
a)
The force of gravitation between two objects is given by Newton's Law of Gravitation. According to this law:

where,
F = Gravitational Force between the person and Earth = ?
G = Universal Gravitational Constant = 6.67 x 10⁻¹¹ Nm²/kg²
m₁ = mass of peerson = 50 kg
m₂ = mass of earth = 5.98 x 10²⁴ kg
r = distance between person and earth = radius of earth = 6.38 x 10⁶ m
Therefore,

F = 489.95 N
b)
The weight of the person will be given as:

W = 490 N
c)
Both have same value