Conservation of momentum in collisions
Grade 11 Science Worksheet
Circle the best answer, or write your answer on the line.
East is positive. A 1.5 kg cart at 6 m/s hits a 0.5 kg cart moving at 0 m/s, and they stick together. What is their velocity after, Ari?
East is positive. A 2.5 kg cart at 4 m/s hits a 1.5 kg cart moving at -2 m/s, and they stick together. What is their velocity after, Bo?
In the momentum bar chart, what is the joined carts' momentum after, Jun?
- 0, since they stuck
- 8 kg·m/s
- 6 kg·m/s
- 10 kg·m/s
In the momentum bar chart, what is the joined carts' velocity after, Kira?
Use the picture in question 3.
- 6 m/s east
- 1.5 m/s east
- 3 m/s east
- 0 m/s, since they stuck
In the momentum bar chart, what were the carts' velocities before, Luz?
Use the picture in question 3.
- A: 2 m/s east; B: 0.5 m/s west
- A: 4 m/s east; B: 1 m/s east
- A: 4 m/s east; B: 1 m/s west
- A: 8 m/s east; B: 2 m/s west
Two carts at rest are pushed apart by a spring. What is their total momentum afterward, Milo?
- More than before
- Equal to the spring's force
- 0 kg·m/s
- The sum of both speeds
A 1 kg cart and a 3 kg cart are pushed apart from rest. Which moves faster, Noah?
- The 1 kg cart, 3 times as fast
- They move equally fast
- Neither moves
- The 3 kg cart
From rest, a 1 kg cart flies east at 3 m/s. The other cart is 2 kg. What is its momentum, Pia?
- −3 kg·m/s, west
- −6 kg·m/s
- 0 kg·m/s
- +3 kg·m/s, east
Two carts collide on a rough rug. Why might their total momentum change, Tala?
- The rug's friction is an outside force
- The carts' pushes on each other change it
- Momentum isn't conserved in collisions
- The carts get lighter
In the two-cart system, which forces cannot change the total momentum, Zee?
- A hand pushing one cart from outside
- Friction from a rough rug
- A magnet pulling one cart from outside
- The carts' pushes on each other