momentum

Question 1

What is momentum?

Answer 1

Momentum is the product of an object’s mass and velocity.

Question 2

What are the units of momentum?

Answer 2

Kilogram meter per second (kg·m/s)

Question 3

Is momentum a scalar or vector quantity?

Answer 3

Vector — it has both magnitude and direction.

Question 4

What is the law of conservation of momentum?

Answer 4

In a closed system, total momentum before an event = total momentum after, if no external forces act.

Question 5

What is impulse?

Answer 5

Change in momentum caused by a force acting over time.

Question 6

How does increasing time reduce force in a collision?

Answer 6

For the same change in momentum, increasing time reduces the force (e.g., airbags, crumple zones).