Momentum

• Momentum is mass times velocity (it is defined as it's formula).
• • Momentum is a quantity possessed by an object in motion.
  • S.I unit is kgm/s.
  • It's a vector quantity
• The principle of momentum states that: The total momentum before collision is equal to the total momentum after collision provided no external forces act on the objects.
• Elastic collision is a collision in which momentum and kinetic energy of the colliding objects is conserved.
• Inelastic collision is a collision in which momentum is conserved but K.E is not conserved.
• The principle of moments states that: At equilibrium the sum of clockwise moment is equal to the sum of anticlockwise moments.