Question

Which of the following are Newton's 2nd Law, Newton's 3rd Law, or Neither.

1. Gravity tugs downward on a box sitting on the ground; the ground pushes up on the box.

2. A thrust force from its propeller pulls a plane forward; a drag force pushes it backward.

3. A team of dogs pulls a sled, moving it; the sled pulls backward on the dogs.

4. A car exerts a forward force on a trailer; the trailer tugs backward on the car.

5. A baseball pushes on a window breaking it; the window pushes back on the baseball

6. The earth attracts a stone; the stone attracts the earth.

So I'm confused as to which is which at first I thought that the order was...

1. 3rd

2. 3rd

3. 2nd

4. 2nd

5. 2nd

6. 3rd

Any pointer would be appreciated.

Answer 1

all are action and reaction pairs... hence all are 3rd laws

Answer 2

1. 3rd

2. 2nd

3. 3rd

4. 2nd

5. 3rd

6. neither

Answer 3

all the statements are based on NEWTON's 3rd Law