Question

The earth exerts a gravitational force of 500 N on Amy. What is Amy’s mass in kg?

Answer 1

Gravitational force of earth is given as weight of object

so here we know that gravitational force on Amy is 500 N

so we will have

$mg = 500 N$

now we will have

$g = 9.8 m/s^2$

now from above equation we will have

$m (9.8 m/s^2) = 500 N$

$m = \frac{500}{9.8} kg$

$m = 51 kg$

so the mass of the Amy is 51 kg