Question

which formula can be used to express the law of conservation of momentum, where p = momentum?
○ (p_i = p_f)
○ (p_i>p_f)
○ (p_i < p_f)
○ (p_i
eq p_f)

Explanation:

The law of conservation of momentum states that the total momentum before an interaction is equal to the total momentum after the interaction. If $p_i$ is the initial momentum and $p_f$ is the final momentum, they are equal in a closed - system.

Answer:

$p_i = p_f$