Momentum

• What is the formula for momentum?

  Momentum = Mass x Velocity
• How does mass affect momentum?

  The greater the mass, the more momentum
• What does it mean that momentum is a vector quantity?

  It has size and direction
• How do you calculate the momentum of an object?

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

  3000 kg m/s
• If 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 the principle of conservation of momentum?

  • Total momentum before an event equals total momentum after
  • Applies in closed systems
  • Example: collisions in snooker
• What happens to momentum in a closed system during a collision?

  It remains constant
• In a snooker game, what happens to the momentum of the balls during a collision?

  The overall momentum stays the same
• What occurs to the momentum of the red and white balls after they collide?

  The combined momentum equals the original momentum
• What happens to the momentum of a moving car after it collides with a parked car?

  The momentum is transferred to the parked car
• How does the mass of the two cars change after a collision?

  The mass increases as they lock together
• What happens to the velocity of the cars after a collision?

  The velocity decreases after the collision
• How does an increase in mass affect momentum after a collision?

  It causes momentum to remain equal