LAWS OF MOTION

 LAWS OF MOTION

The chapter "Laws of Motion" in Class XI Physics deals with the fundamental principles that govern the motion of objects. It primarily focuses on three laws known as Newton's Laws of Motion. Let's go through them one by one:

1. Newton's First Law of Motion (Law of Inertia):
   • Definition: An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and direction unless acted upon by an external force.
   • Formula: F = 0 (Net force acting on an object at rest or moving with constant velocity is zero)
2. Newton's Second Law of Motion:
   • Definition: The rate of change of momentum of an object is directly proportional to the net external force acting on it and takes place in the direction in which the force acts.
   • Formula: F = ma (Force equals mass multiplied by acceleration)
3. Newton's Third Law of Motion (Law of Action-Reaction):
   • Definition: For every action, there is an equal and opposite reaction.
   • Formula: F₁₂ = -F₂₁ (The force exerted by object 1 on object 2 is equal in magnitude but opposite in direction to the force exerted by object 2 on object 1)

Additionally, there are a few more important formulas related to motion:

1. Momentum (p):

   • Definition: Momentum is the product of an object's mass and velocity.
   • Formula: p = mv (momentum equals mass multiplied by velocity)

2. Impulse (J):

   • Definition: Impulse is the change in momentum of an object when a force acts upon it for a certain time interval.
   • Formula: J = Δp = FΔt (impulse equals change in momentum equals force multiplied by time)

3. Work-Energy Theorem:

   • Definition: The work done on an object is equal to the change in its kinetic energy.
   • Formula: W = ΔKE = KEf - KEi (work equals change in kinetic energy)

4. Conservation of Momentum:

   • Definition: In an isolated system, the total momentum remains constant if no external force acts on it.
   • Formula: m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂ (initial momentum equals final momentum)

These are the key concepts and formulas related to the Laws of Motion chapter in Class XI. Understanding and applying these principles will help you analyze and solve various problems related to motion and forces.

1. MCQ WORK SHEET 1 (JEE/NEET)
2. MCQ WORK SHEET 2 (JEE/NEET)
3. MCQ WORK SHEET 3 (JEE/NEET)
4. MCQ WORK SHEET 4 (JEE/NEET)
5. MCQ WORK SHEET 5 (JEE/NEET)
6. MCQ WORK SHEET 6 (JEE/NEET)
7. MCQ WORK SHEET 7(JEE/NEET)