📚 Laws of Motion – Easy & Clear
Notes (Physics)
1. Newton’s First Law – Law of Inertia
➢Definition: An object remains at rest or
continues to move at a constant speed in a
straight line unless acted upon by an external
force.
Meaning in Simple Words:Objects like to “keep doing
what they are doing” — they resist change.
Types of Inertia:
1. Inertia of Rest – Resistance to starting motion.
Example: Passengers in a stationary bus lean
backward when the bus suddenly starts.
2. Inertia of Motion – Resistance to stopping.
Example: Passengers in a moving bus lean forward
when brakes are applied suddenly.
Notes (Physics)
1. Newton’s First Law – Law of Inertia
➢Definition: An object remains at rest or
continues to move at a constant speed in a
straight line unless acted upon by an external
force.
Meaning in Simple Words:Objects like to “keep doing
what they are doing” — they resist change.
Types of Inertia:
1. Inertia of Rest – Resistance to starting motion.
Example: Passengers in a stationary bus lean
backward when the bus suddenly starts.
2. Inertia of Motion – Resistance to stopping.
Example: Passengers in a moving bus lean forward
when brakes are applied suddenly.
