Question

2 - 1 mastery check: newtons 3rd law
version a
identify the 3rd law force pair for each force below.

1. jet pushes air south.
2. pencil pushes paper down with a 4 n force.
3. the ground pushes on the meteorite with a 3,000 n force.

draw the force pair.
you apply an upward force to lift a heavy grocery bag. what evidence supports the existence of a force pair?

Explanation:

Newton's third law states that for every action, there is an equal and opposite reaction. The force pairs are identified based on this principle.

1. When the jet pushes air south (action), the air pushes the jet north (reaction).
2. When the pencil pushes the paper down with a \(4\ \text{N}\) force (action), the paper pushes the pencil up with a \(4\ \text{N}\) force (reaction).
3. When the ground pushes on the meteorite with a \(3000\ \text{N}\) force (action), the meteorite pushes on the ground with a \(3000\ \text{N}\) force (reaction). For the grocery bag, when you apply an upward force to lift it (action), the bag applies a downward force on your hand (reaction), which you can feel as the weight of the bag.

Answer:

1. Air pushes jet north.
2. Paper pushes pencil up with \(4\ \text{N}\).
3. Meteorite pushes ground with \(3000\ \text{N}\). For the grocery bag: You feel the downward pull (weight) of the bag on your hand, which is the reaction force.