first one is true, there's no net force acting on it thats greater than another or making it unbalanced, if there was the object would be in some kind of motion
All scientist use meters, that way scientist can share information across country without needing to convert the data.
3. is air resistance
4. The large rock
It should be 0.25kg because you converter from g to kg and since 1g<1kg so you move the decimal to the left
Answer: question 1 is b I believe
Explanation:
every action has an opposite reaction