Momentum

• What formula is used to calculate the momentum of an object?

  p = mv
• What is the momentum of a 50 kg cheetah running at 60 m/s?

  3000 kg m/s
• What determines how much 'oomph' an object has?

  Momentum
• What two factors determine an object's momentum?

  Mass and velocity
• What type of quantity is momentum?

  Vector
• What is the formula for momentum?

  Momentum = Mass x Velocity
• A boy has a mass of 30 kg and a momentum of 75 kg m/s, what is his velocity?

  2.5 m/s
• What is another way of describing a closed system?

  No external forces act
• In a closed system, what is the relationship between momentum before and after an event?

  Momentum Before = Momentum After
• What principle states that in a closed system, the total momentum remains constant?

  Conservation of momentum
• In a snooker ball collision, what remains the same?

  The overall momentum
• Before a snooker ball collision, what is the momentum of the stationary red ball?

  Zero
• After the white ball hits the red ball, what happens to the white ball's velocity?

  It decreases
• After a collision, the combined momentum of the red and white ball is equal to what?

  Original momentum of the white ball
• What happens to the velocity of two cars that stick together after a collision?

  It decreases
• In a collision where two cars stick together, what causes the decrease in velocity?

  An increase in mass
• In an explosion with zero initial momentum, what is the total momentum after?

  Zero
• After an explosion, why is the total momentum zero even though pieces fly off in different directions?

  The momenta cancel out
• Besides magnitude, what other property does momentum have?

  Direction