# Problem: The total momentum of a flock of identical birds could be zero only if the birds are A) flying in the direction B) very tired and coming down to rest. C) taking off from the ground. D) flying in different directions.

###### FREE Expert Solution

Momentum:

$\overline{){\mathbf{\Sigma P}}{\mathbf{=}}{\mathbit{\Sigma }}{\mathbf{mv}}}$, where m is the mass and v is the velocity.

The mass of the birds is a constant that cannot change.

Only the velocity can change.

###### Problem Details

The total momentum of a flock of identical birds could be zero only if the birds are

A) flying in the direction

B) very tired and coming down to rest.

C) taking off from the ground.

D) flying in different directions.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intro to Momentum concept. You can view video lessons to learn Intro to Momentum. Or if you need more Intro to Momentum practice, you can also practice Intro to Momentum practice problems.