Physics - Force and momentum

• What is the conservation of energy?

  Energy cannot be created or destroyed only transferred between different forms.
• What is the conservation of momentum?

  Total momentum before = total momentum after
• What is an elastic collision?

  Total Ek before = total Ek after
• What is an Inelastic collision?


  total Ek before does not equal total Ek after
• What is an impulse?

  Change of momentum of an object when a force acts on it. Product of force times time.
• What is inertia?

  The resistance of an object to withstand a change in motion.
• Momentum examples in book.
• Collision examples in book like inelastic and elastic.
• What are the three different scenarios of momentum collisions?

  1. Standard collision m1u1 + m2u2 =m1v1 + m2v2
  2. Objects join on impact m1u1 + m2u2 = (m1 + m2)v
  3. Head on collision m1u1 +m2u2 = -m1v1 +m2v2
• F=ma

  F=m((v-u)/t)

  FΔt = Δmv