In this exercise, you are asked to match each sentence with the corresponding law of motion: Newton's First Law (A), Second Law (B), or Third Law (C).
4. When you push your friend on roller skates, you roll backwards.
- This scenario is described by Newton's Third Law (C). It states that for every action, there is an equal and opposite reaction. When you push your friend, the force propelling them forward causes an equal force pushing you backwards.
5. The harder you push something, the faster it moves.
- This statement is related to Newton's Second Law (B). The Second Law states that the acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass. Therefore, the harder you push something (increasing the force), the faster it will move (increasing acceleration).
6. A ball doesn't roll until you push it.
- This situation is explained by Newton's First Law (A), also known as the Law of Inertia. It states that an object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an external force. In this case, the ball remains stationary until an external force (your push) is applied to set it in motion.
7. When you put on the brakes in a car quickly, the passengers fly forward.
- This event is an example of Newton's First Law (A). When the car suddenly stops (due to applying the brakes), the passengers, who were in motion with the car, tend to remain in motion due to inertia, causing them to move forward.
8. A rocket goes forward by pushing hot gases out backward.
- This description aligns with Newton's Third Law (C). The Third Law states that for every action, there is an equal and opposite reaction. As the rocket expels hot gases backward, an equal force pushes the rocket forward.
9. The more mass an object has, the harder it is to move it.
- This statement is connected to Newton's Second Law (B). According to the Second Law, the acceleration of an object is inversely proportional to its mass. Therefore, an object with more mass requires more force to accelerate it compared to an object with less mass.
10. A hockey puck travels in a straight line after it is hit.
- This example demonstrates Newton's First Law (A). Once the hockey puck is hit and set in motion, it continues to move in a straight line at a constant speed unless acted upon by an external force due to the law of inertia.
