To calculate the mass of the body, we need to divide its weight by the acceleration due to gravity.
Weight = Mass * Acceleration due to gravity
In this case, the weight is given as 720N and the acceleration due to gravity is 10 m/s².
720N = Mass * 10 m/s²
To find the mass, we can rearrange the equation:
Mass = Weight / Acceleration due to gravity
Mass = 720N / 10 m/s²
Mass = 72 kg
However, since you specifically asked for the mass in grams, we can convert it:
Mass = 72 kg * 1000 g/kg
Mass = 72000 g
Therefore, the mass of the body is 72000 grams when the acceleration due to gravity is 10 m/s².