Newton's third law of motion states that for any action, there is equal and opposite force. For a person standing on a floor, the action force is the weight and thus the floor must exert an opposite and equal reaction force equivalent in magnitude to the weight of the person.
In this regard, statement 3. is correct.
True. Light can be described both as flow of particles and as an electromagnetic wave.
Answer:
Obstructions can happen. Outside forces can act upon it.
Explanation:
I'm not very good with Physics but of what I do know I'd go with point B / 4seconds
I apologize in advance if that is incorrect.