Physics

Work-energy theorem, types of energy (kinetic, potential, etc.)

  1. The Work-Energy Theorem states that the work done by all forces acting on an object is equal to the change in its kinetic energy.
  2. The mathematical expression for the Work-Energy Theorem is W = ΔKE, where W is work and ΔKE is the change in kinetic energy.
  3. Kinetic Energy (KE) is the energy of an object due to its motion, given by KE = ½ mv², where m is mass and v is velocity.
  4. Potential Energy (PE) is the energy stored in an object due to its position or configuration.
  5. The formula for gravi

Definitions and units

  1. Work is done when a force is applied to an object, and the object moves in the direction of the applied force.
  2. The mathematical formula for work is W = F × d × cos(θ), where F is the force, d is the displacement, and θ is the angle between the force and displacement.
  3. The SI unit of work is the joule (J), where 1 joule = 1 newton × 1 meter.
  4. Positive work occurs when the force and displacement are in the same direction.
  5. Negative work occurs when the force

Force, friction, and types of friction

  1. Force is a vector quantity that can change the state of motion or shape of an object.
  2. The SI unit of force is the newton (N).
  3. Force is classified into contact forces (e.g., friction, tension) and non-contact forces (e.g., gravitational, electrostatic).
  4. Friction is the resisting force that opposes the motion or tendency of motion between two surfaces in contact.
  5. The direction of frictional force is always opposite to the direction of moti

Inertia, momentum, and conservation of momentum

  1. Inertia is the property of an object to resist changes in its state of motion or rest.
  2. The First Law of Motion, also called the Law of Inertia, states that an object will remain at rest or in uniform motion unless acted upon by an external force.
  3. The Second Law of Motion states that the force acting on an object is directly proportional to the mass and acceleration, i.e., F = ma.
  4. The Third Law of Motion states that for every action, there is an equal and opposite reaction.
  5. Moment

Newton's Laws of Motion

  1. Newton's First Law of Motion: Also known as the Law of Inertia, it states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
  2. Inertia: The tendency of an object to resist changes in its state of motion is called inertia.
  3. Newton's Second Law of Motion: The force acting on an object is equal to the rate of change of its momentum, expressed as F = ma, where F is force, m is mass, and a
Physics