Final answer:
To calculate Brendon's mass in kilograms, use Newton's universal law of gravitation. Rearrange the formula and substitute the values for known quantities to find the mass.
Step-by-step explanation:
To calculate Brendon's mass in kilograms, we can use Newton's universal law of gravitation. The formula is F = GMm/r^2, where F is the gravitational force, G is the gravitational constant, M is the mass of the Earth, m is Brendon's mass, and r is the radius of the Earth.
The given gravitational force is 500N, so we can rearrange the formula to solve for m. m = Fxr^2 / (G*M). By substituting the known values for G, M, and r, we can calculate Brendon's mass in kilograms.
It is important to note that the mass of an object remains constant regardless of its location, while weight, which is the force of gravity acting on an object, can vary depending on the strength of the gravitational field.