What is the mass of object on earth if it has 400 N ?

Answer 1

F = m * a

In this situation, you are given the force applied on the object, which is 400N.

The acceleration of gravity on Earth, which is a force applied to all objects on Earth, is 9.8 m/s²

So, using our equation above:

F = m * a

400 N = (m) * (9.8 m/s²)

--one Newton is also equal to one kg/m/s²--

400 kg/m/s² = (m) * (9.8 m/s²)

--divide by 9.8 m/s² on both sides--

40.82 kg = m