Answer:
If a car weighs 6310 N on earth, its mass = 643.22 kg.
Step-by-step explanation:
Weight of a body is given by the product of it's mass and acceleration due to gravity on that planet.
So weight of body in earth = mass of body* acceleration due to gravity on earth.
Acceleration due to gravity in earth =

Here it is given weight of car = 6310 N
So we have, 6310 = mass of car* 9.81
Mass of car = 6310/9.81 = 643.22 kg.
So If a car weighs 6310 N on earth, its mass = 643.22 kg.