According to Newton's third law of motion, which statement is always correct?

If a moving object hits another object, then the second object will start moving.
If a moving object hits another object, then the second object will push back.
If two moving objects collide, then they will bounce off each other.
If two moving objects collide, then both will stop moving.

If two moving objects collide, then they will bounce off each other.

Two metal balls with the same mass hang so that they are touching each other. The ball on the left is pulled to the side and released. What will happen when it swings back an dhits the ball on the right?

When the ball on the left swings back and hits the ball on the right, according to Newton's third law of motion, both balls will exert equal and opposite forces on each other. This means that the ball on the right will be pushed in the opposite direction with the same force that the left ball exerts on it. As a result, both balls will start moving in the opposite direction after the collision.

Two metal balls with the same mass hang so that they are touching each other. The ball on the left is pulled to the side and released. What will happen when it swings back an dhits the ball on the right?

Both balls will swing to the left.
The ball on the right will swing to the right.
Both balls will swing to the right.
The ball on the left will stop, and the ball on the right will remain still.

Both balls will swing to the right.

How do bumper cars at an amusement park demonstrate Newtons's third law?

Bumper cars at an amusement park demonstrate Newton's third law of motion through the concept of action and reaction. When a bumper car collides with another bumper car, an action force is exerted on the second car, and an equal and opposite reaction force is exerted back on the first car. This collision between the cars showcases the principle of Newton's third law as the forces between the cars are equal in magnitude and opposite in direction. This allows the cars to bounce off each other and change their direction of motion.