Hey guys, can you please take a look at this for me?
I want to be sure about question 2.
You see there are two answers for part 2(a)
1. They act on the same body or do not act on different bodies
2. They are different types of, or they are not the same type of, force
I agree with the first one, but I believe that the second answer is incorrect, can anyone please tell me as to why the second answer is correct or if I am the one who is correct.
Because Newton's third law only talks about two separate forces on two separate bodies. The reaction force is a different kind of force in comparison to gravity....
Can anyone help?
Newton's third law,
'
When a body 'A' exerts a force on body ''B',then body 'B' exerts a force of the same type on body 'A' which is equal in magnitude but opposite in direction.'
From the above statement it could be understand that
1)The two forces are equal in magnitude but opposite in direction
2)Two forces must be acting on two separate body.(in the above statement 'A' &'B'.)
3)The two forces must be same type of force.
4)The two forces must be acting for the same period of time i.e if body 'A' exerts a force for 't' second than on body 'B' then body 'B' exerts a force for 't' second than on body 'A'.
In the question,
1) 'F-1' &'F-2' are acting on the same body.So it is violating the point 2.
2) 'F-1' &'F-2' are not same type of force.'F-1' is normal reaction force whereas 'F-2' is weight.So it is violating point 3.