Question
Which of the following statements is true according to the First Law of Motion?
The correct answer is
A person continues to move forward when a car stops suddenly.
Understanding the First Law of Motion
The First Law of Motion, also known as the Law of Inertia, states that an object will remain at rest or in uniform motion in a straight line unless acted upon by a net external force. Inertia is the resistance of any physical object to any change in its state of motion.
Analyzing the Options
- Option 1 & 4: Acceleration (car starting, rocket launching) requires a force, not directly illustrating the state of constant motion or rest without a net force.
- Option 2: A falling stone is primarily influenced by the force of gravity, causing acceleration.
- Option 3: A person continuing to move forward when a car stops suddenly demonstrates inertia. The person's body tends to maintain its state of motion (moving forward) even when the car stops due to an external force. This is a direct application of the First Law of Motion.
Conclusion
Option 3 accurately describes a real-world scenario illustrating the principle of inertia, a core concept of the First Law of Motion.
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Important Questions from Motion
- A person ignores regular vehicle maintenance. Which of the following is most likely to happen?
- What does the velocity-time graph look like for an object moving with uniform uniform velocity?
- When you sit on a chair, the chair exerts an upward force on you. The reaction force in this case is:
- What do we call the motion of an object that travels equal distances in equal intervals of time, even when the time intervals are very small?
- An object moves 10 m in 2 s. On a distance-time graph, what is the slope?
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