Physics
Momentum flashcards
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- What is impulse?Impulse
- The net force integrated over time.
- What does impulse equal?Impulse
- Change in momentum.
- What does force–time area represent?Impulse
- Impulse.
- Why can a longer stopping interval reduce average force?Impulse
- The same momentum change is spread over more time.
- Is momentum a scalar or vector?Conservation of Momentum
- A vector.
- What condition permits total momentum conservation?Conservation of Momentum
- Negligible net external impulse.
- What is a perfectly inelastic collision?Collisions
- The objects move together afterward.
- What distinguishes an ideal elastic collision?Collisions
- Total kinetic energy as well as momentum is conserved.
- Can kinetic energy decrease in a collision?Collisions
- Yes; it can transfer into deformation, thermal energy, or sound.
- What is required before conserving collision momentum?Collisions
- Negligible net external impulse on the selected system.