Answer:
0.71 kg
Explanation:
a common equation in physics is w = mg
we can rearrange this to m = w/g
g is the acceleration of gravity: 9.81 m/s^2
w is the weight of the given equation of the object: 7 kg
so m = 7 kg รท 9.81 m/s^2
this gives us: m = 0.71 kg