momentum Flashcards
(6 cards)
1
Q
What is momentum?
A
Momentum is the product of an object’s mass and velocity.
2
Q
What are the units of momentum?
A
Kilogram meter per second (kg·m/s)
3
Q
Is momentum a scalar or vector quantity?
A
Vector — it has both magnitude and direction.
4
Q
What is the law of conservation of momentum?
A
In a closed system, total momentum before an event = total momentum after, if no external forces act.
5
Q
What is impulse?
A
Change in momentum caused by a force acting over time.
6
Q
How does increasing time reduce force in a collision?
A
For the same change in momentum, increasing time reduces the force (e.g., airbags, crumple zones).
