Question

identify which of newtons laws of motion are demonstrated with the number (1,2 or 3).
1.
a rock will begin to move once it is pushed.
enter 1, 2 or 3 here.
2.
as the air from the balloon comes out, the balloon in the opposite direction.
enter 1, 2 or 3 here.
3.
when the mallet hits the ball, it begins to move.
enter 1, 2 or 3 here.
4.
a soccer ball requires less force to move than the bowling ball.
enter 1, 2 or 3 here.
5.
as your feet push on the ground, the ground pushes back up toward your feet.
enter 1, 2 or 3 here.
6.
a car stops moving once it crashes into a wall.
enter 1, 2 or 3 here.
7.
a rock stays in the same position without moving.
enter 1, 2 or 3 here.
8.
a rocket propels upward due to the force of the exhaust pushing down.
enter 1, 2 or 3 here.

Explanation:

Step1: Recall Newton's laws

Newton's first law: An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.
Newton's second law: \(F = ma\) (force equals mass times acceleration).
Newton's third law: For every action, there is an equal and opposite reaction.

Step2: Analyze each situation

1. A rock will begin to move once it is pushed. This is Newton's second law (\(F = ma\), force causes acceleration).
2. As the air from the balloon comes out, the balloon moves in the opposite direction. This is Newton's third law (action - reaction).
3. When the mallet hits the ball, it begins to move. This is Newton's second law (\(F = ma\)).
4. A soccer ball requires less force to move than the bowling ball. This is Newton's second law (\(F = ma\), less mass requires less force for same acceleration).
5. As your feet push on the ground, the ground pushes back. This is Newton's third law (action - reaction).
6. A car stops moving once it crashes into a wall. This is Newton's first law (unbalanced force - the wall - stops the car).
7. A rock stays in the same position without moving. This is Newton's first law (no unbalanced force, so no change in motion).
8. A rocket propels upward due to the force of the exhaust pushing down. This is Newton's third law (action - reaction).

Answer:

1. 2
2. 3
3. 2
4. 2
5. 3
6. 1
7. 1
8. 3