Grade 11 · Science · Physics

11th grade Conservation of momentum in collisions worksheet

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Conservation of momentum in collisions

Grade 11 Science Worksheet - Building Confidence

NameDate

Circle the best answer, or write your answer on the line.

East is positive. A 2 kg cart moves at 4 m/s and a 1 kg cart moves at -3 m/s. What is their total momentum, Ari?
East is positive. A 3 kg cart moves at 2 m/s and a 2 kg cart moves at -1 m/s. What is their total momentum, Bo?
3.
In the momentum bar chart, what is the total momentum before the collision, Jun?
- 10 kg·m/s
- 6 kg·m/s
- 0 kg·m/s
4.
In the momentum bar chart, what is cart A's momentum after the collision, Kira?
Use the picture in question 3.
- 2 kg·m/s
- 6 kg·m/s, as before
- 10 kg·m/s
5.
In the momentum bar chart, what is the total momentum after the collision, Luz?
Use the picture in question 3.
- 6 kg·m/s
- 0 kg·m/s
- 4 kg·m/s, cart B's alone
6.
Two carts collide on a smooth, level track. Which quantity stays the same, Milo?
- Each cart's speed
- Their total speed
- Their total momentum
7.
Two carts collide and stick together. Is momentum conserved, Noah?
- No, because one cart stops
- Yes; momentum still adds up the same
- No, because they stick
8.
When might two carts' total momentum change during a collision, Pia?
- When an outside force like rug friction acts
- At no time; it can't change
- When the carts stick together
9.
East is positive. A 1 kg cart moves west at 5 m/s. What is its momentum, Tala?
- +5 kg·m/s
- −5 kg·m/s
- 0 kg·m/s
10.
A 2 kg cart at 2 m/s east and a 1 kg cart at 4 m/s west collide. What is the total momentum after, Zee?
- 0 kg·m/s
- 4 kg·m/s
- 8 kg·m/s

Conservation of momentum in collisions. Every version has 10 questions, and the answer key prints on the second page.

I can add momenta with signs (east positive) and use "total before = total after" for carts on a smooth track.
I can solve sticking collisions (v = total momentum ÷ total mass) and push-apart releases from rest (equal and opposite momenta).
I can explain when momentum is conserved: the system includes both carts, and no outside net force acts, such as friction from a rough rug.

Standard: HS-PS2-2

system: The objects chosen for study, here both carts

conserved: Staying the same total before and after

internal force: A force between objects inside the system

outside force: A force from something outside the system, like rug friction

recoil: Moving backward when something is pushed away from you

Your child dropped a minus sign. Momentum has a direction: a cart moving west has negative momentum.

Your child averaged the two velocities. Sticking carts share the total momentum, so divide it by the total mass.

Your child thought the speeds are what stay the same. It is the total momentum, m × v added with signs, that is conserved.

What is the most common mistake with conservation of momentum in collisions?

Your child dropped a minus sign. Momentum has a direction: a cart moving west has negative momentum.

Are these 11th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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