5.7.2 Conservation of Momentum

• The equation for the conservation of momentum is p_{b}efore = p_{a}fter
• Match the type of event with its description:

  Isolated Collision ↔️ Momentum is transferred between objects

  Explosion ↔️ Momentum is distributed among products
• Momentum is defined as the product of mass and velocity
• Arrange the following quantities based on whether they are vector or scalar:

  1️⃣ Momentum (Vector)

  2️⃣ Speed (Scalar)

  3️⃣ Energy (Scalar)
• Momentum is a vector quantity.

  True
• Speed is a scalar quantity.


  True
• Momentum is the product of an object's mass and velocity
• What does 'p' represent in the momentum formula?

  Momentum
• The conservation of momentum states that total momentum remains constant in a closed, isolated system.


  True
• In an isolated system, the total momentum before an event equals the total momentum after
• Steps to apply the conservation of momentum equation

  1️⃣ Identify the masses and velocities before and after

  2️⃣ Calculate the total momentum before and after

  3️⃣ Set the total momentum before equal to after

  4️⃣ Solve for the unknown variable
• A 1000 kg car moving at 15 m/s has a momentum of 15000 kg m/s.
• Match the concept with its description:

  Momentum ↔️ Product of mass and velocity

  Vector ↔️ Has magnitude and direction
• In an explosion, total momentum before equals total momentum after.


  True
• What is the velocity of object A after a collision if its mass is 2 kg and its momentum after the collision is 4 kg m/s?

  2 m/s
• What is momentum defined as?

  Mass times velocity
• Newton's Third Law is related to the conservation of momentum.


  True
• In an isolated system, the total momentum before an event is equal to the total momentum after the event.

  True
• Momentum is a vector quantity.


  True
• Momentum is calculated as the product of mass and velocity
• Speed is defined as displacement divided by time
• Energy is defined as the capacity to do work
• The formula for momentum is $p =$$mv$.


  True
• Momentum is a vector quantity because it has both magnitude and direction
• What external forces can violate the conservation of momentum?

  Friction or air resistance
• The conservation of momentum equation is $p_{b}efore =$$p_{a}fter$.


  True
• What is the momentum of a 5 kg ball moving at 8 m/s?

  40 kg m/s
• What are the two components of momentum?

  Mass and velocity
• The conservation of momentum applies to isolated collisions and explosions
• To apply the conservation of momentum equation, first identify the masses and velocities of the objects involved.
• What does the conservation of momentum equation state in an isolated collision or explosion?

  Total momentum remains constant
• Steps to apply the conservation of momentum equation

  1️⃣ Identify the masses and velocities of the objects involved before and after the event.

  2️⃣ Calculate the total momentum before and after using $p =$$mv$.

  3️⃣ Set $p_{b}efore =$$p_{a}fter$ and solve for the unknown.
• What is conserved in an elastic collision in addition to momentum?

  Kinetic energy
• Match the type of collision with its conservation properties:

  Elastic Collision ↔️ Momentum and Kinetic Energy

  Inelastic Collision ↔️ Momentum only
• The equal and opposite forces in Newton's Third Law lead to equal and opposite changes in momentum.


  True
• In the conservation of momentum equation, p stands for momentum.
• Momentum is a vector quantity, meaning it has both magnitude and direction.


  True
• In an inelastic collision, kinetic energy is not conserved but converted into heat or sound.
• What does Newton's Third Law state?

  Every action has an equal and opposite reaction
• The conservation of momentum states that total momentum remains constant in a closed system.