you have the numbers and the formula. What's the problem?
All you need is the person's mass: 700/9.8 kg
If a person weighs 700N on Earth, what force due to gravity would they exert on a 1500kg car they are standing 1.5m from? Assume the distance is between their centres of mass.
F=Gm1xm2/r^2?
1 answer