what is the weight of a 1200N man on earth ? whats his mass ?

Question

I do not know how to solve this and I need help,

Answer 1

Hi Jessica,

Your question actually contains one of the answers since 1200N is a weight since it is the force of gravity on the man. The question about his mass is solved by solving the equation

Weight = mass times the acceleration of gravity on Earth (9.81m/s²).

1200N = mass x 9.81m/s²

mass = 122 kg

 

Answer 2

The man's weight is just 1200 N  (In SI units)

The man's mass is 1200 / 9.81   =  122.3  kg

 

(the  9.81 is  g, the acceleration due to gravity;   the unit for g is m/s2)