2.7 Applications of conservation laws

• Momentum is conserved in collisions unless an external force acts on the system.


  True
• The conservation of energy states that the total energy of an isolated system is constant over time.
• Energy can neither be created nor destroyed according to the conservation of energy.
• In a closed system, the total momentum before an event is equal to the total momentum after the event.
• The conservation of energy states that the total energy of an isolated system remains constant over time.
• The law of conservation of energy states that the total energy of an isolated system is constant
• The total momentum before a collision equals the total momentum after in a closed system


  True
• What characterizes an elastic collision?

  Kinetic energy is conserved
• What happens to energy in an isolated system according to conservation of energy?

  Total energy remains constant
• What does the conservation of energy state about the total energy of an isolated system?

  Remains constant
• Match the conservation law with its description:

  Conservation of Momentum ↔️ Total momentum is constant unless acted upon by external force

  Conservation of Energy ↔️ Total energy is constant in an isolated system
• The total momentum after a collision is always less than the total momentum before

  False
• Match the conservation law with its description:

  Conservation of Momentum ↔️ Total momentum of a closed system remains constant

  Conservation of Energy ↔️ Total energy of an isolated system remains constant
• What is the formula for momentum?

  $p =$$mv$
• In an inelastic collision, some kinetic energy is converted to other forms such as heat or sound.
• Match the interaction with its energy transformation:

  Collisions ↔️ Kinetic energy to heat or sound

  Explosions ↔️ Chemical potential energy to kinetic energy

  Radioactive Decay ↔️ Nuclear potential energy to kinetic energy
• Particle accelerators use the conservation of energy and charge to study particle properties.


  True
• What are conservation laws?

  Fundamental physical principles
• Match the conservation law with its description:

  Conservation of Energy ↔️ Total energy is constant

  Conservation of Momentum ↔️ Total momentum is constant

  Conservation of Charge ↔️ Total charge is constant
• Momentum is conserved in explosions.

  True
• The conservation of momentum applies only to closed systems.


  True
• Energy can be transformed from kinetic energy to potential energy.


  True
• Energy can be destroyed in a closed system.

  False
• The laws of conservation are fundamental to understanding the physical world


  True
• What is the formula for momentum?

  $p =$$mv$
• In an inelastic collision, kinetic energy is converted to other forms such as heat or sound


  True
• Energy can neither be created nor destroyed, only transformed


  True
• The law of conservation of momentum states that the total momentum of a closed system remains constant unless acted upon by an external force
• In which type of event is momentum conserved according to the law of conservation of momentum?

  Collisions and explosions
• The conservation of momentum states that the total momentum of a closed system remains constant unless an external force acts on it.
• The conservation of momentum applies in collisions and explosions, where the total momentum before the event equals the total momentum after.
• In a closed system, the total momentum before a collision is equal to the total momentum after the collision.
• What is the equation for the conservation of momentum in a collision involving two objects?

  $m_{1}v_{1i} +$$m_{2}v_{2i} =$$m_{1}v_{1f} +$$m_{2}v_{2f}$
• Rocket propulsion demonstrates the conservation of momentum, where ejecting gases in one direction propels the rocket in the opposite direction.
• Radioactive decay conserves both energy and momentum, allowing it to be used in nuclear power and medical treatments.
• The conservation of energy states that energy can only be transformed or transferred
• What happens to momentum in a closed system during a collision?

  It remains constant
• What is the role of external forces in the conservation of momentum?

  They change the momentum
• In what situations is momentum conserved?

  Collisions and explosions
• What is the effect of external forces on the total momentum of a system?

  It changes the momentum