momentum & conservation of momentum.

Question 1

what is the formula?

Answer 1

momentum= mass ×
velocity.
p=m×v.
mass= kg.
velocity= m/s.
momentum= kgm/s
vector.

Question 2

what is a closed system?

Answer 2

unable to exchange energy and matter with their surroundings and isn’t affected by external forces eg: friction.

Question 3

what is the principle of conservation of momentum?

Answer 3

in a closed system the total momentum before an event is equal to total momentum after the event. applies to explosions and collisions.

Question 4

how is the velocity affected, how is momentum affected and how is the total momentum affected?

Answer 4

velocity (and hence momentum) of one object decreased and the other increased.
momentum lost by 1 was equal to the momentum gained by mass 2.
total momentum before the collision was equal to the total momentum after the collision.