All Flashcards
What is the effect of doubling the mass of an object on its momentum, assuming velocity remains constant?
The momentum doubles.
What is the effect of doubling the velocity of an object on its momentum, assuming mass remains constant?
The momentum doubles.
What happens to the total momentum of an isolated system during a collision?
The total momentum remains constant (is conserved).
What happens to kinetic energy in an inelastic collision?
Kinetic energy is not conserved; some is converted to other forms of energy like heat and sound.
What happens to kinetic energy in an explosion?
Kinetic energy increases as potential energy is converted.
What is the effect of increasing the time of impact during a collision?
Reduces the force experienced by the objects involved, given the impulse remains the same.
What is the effect of applying a force over a longer contact time?
Increases the impulse and thus the change in momentum of the object.
What happens to the total momentum in a closed system during a collision?
The total momentum remains constant; it is conserved.
What happens when objects stick together after a collision?
It is a perfectly inelastic collision, and kinetic energy is not conserved.
What is the effect of external forces on the conservation of momentum?
External forces prevent the conservation of momentum within the system.
What are the steps to apply conservation of momentum?
- Identify the system and ensure it's closed (no external forces). 2. Write down the initial momentum of all objects in the system. 3. Write down the final momentum of all objects in the system. 4. Set the total initial momentum equal to the total final momentum: . 5. Solve for the unknown quantities.