Common health issues that can be positively affected, prevented or controlled by exercise.
Some say one year and a half
Answer:
is the mass of librarian.
Explanation:
Given:
- mass of the system,

- velocity of librarian relative to the ground,

- velocity of the cart relative to the ground,

N<u>ow using the principle of elastic collision:</u>
Net momentum of the system is zero.


is the mass of librarian.
The correct answer is C july-september plz mark as brainliest!
It is b. It gains momentum when going down. Think of it like a sled. When you go up the hill, it goes slower, but when you go down the hill, you gain speed(momentum) and it increases