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.
Important Questions from Motion
The motion of a particle of mass m is described by the relation, y = ut - 1⁄2 gt2, where u is the initial velocity of the particle. The force acting on the particle is
The motion of ______ body is an example of uniformly accelerated motion.
- in a particular direction is velocity.
Motion of an object is if its velocity is constant.
The motion of the body moving along a circular path is an example of ______.
