What are the three Laws of Motion?-Class 11 Physics Notes

Newton’s first law:

• Newton’s first law says that a body at rest or in uniform motion will remain so until and until a net external force acts on it.
• Newton’s first rule of motion states that objects cannot start, halt, or change direction on their own, and that such a shift requires some external force.
• Inertia is the ability of huge masses to resist changes in their state of motion.
• The law of inertia is another name for the first law of motion.

Newton’s second law:

• According to Newton’s second law, the acceleration of an object caused by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the object’s mass.
• Newton’s second law describes precisely how much an object will accelerate for a given net force.
• Mathematically, we express the second law of motion as follows:

F=ma

Newton’s third law:

• Newton’s third law asserts that every action has an equal and opposite reaction.
• Newton’s third law of motion implies the conservation of momentum.