Momentum and impulse
Grade 11 Science Worksheet - Challenge Me
Circle the best answer, or write your answer on the line.
A 0.5 kg ball hits a wall at 4 m/s and bounces straight back at 4 m/s. The contact lasts 0.05 s. What is the average force on it, Ari?
A 0.2 kg ball hits a wall at 10 m/s and bounces straight back at 6 m/s. The contact lasts 0.02 s. What is the average force on it, Bo?
A 1.5 kg cart hits a spring bumper at 2 m/s and bounces straight back at 1 m/s. The contact lasts 0.1 s. What is the average force on it, Esme?
In the momentum bar chart, what is the ball's change in momentum, Jun?
- 0 kg·m/s, since the speed is the same
- +4 kg·m/s
- −2 kg·m/s
- −4 kg·m/s
In the momentum bar chart, how fast is the ball moving before and after the bounce, Kira?
Use the picture in question 4.
- 1 m/s both times
- 2 m/s both times
- 4 m/s both times
- 4 m/s, then 0
Noah says a ball that bounces back at the same speed had no change in momentum. Agree or disagree?
- Agree: momentum depends just on speed
- Agree: a soft wall makes the force bigger
- Disagree: its direction flipped
- Agree: the speed didn't change
Pia says a foam bumper lowers the force on a cart because it makes the stop take longer. Agree or disagree?
- Disagree: the cart's mass alone matters
- Disagree: longer stops mean bigger forces
- Disagree: momentum has no direction, so foam can't help
- Agree: F = Δp ÷ Δt
Ren wants a bumper that stops carts gently. Which design helps most?
- A thinner wooden block
- A hard steel plate
- A springy plate that bounces carts back
- Thick foam that squashes slowly
A springy bumper bounces carts back instead of stopping them. What happens to the impulse it gives, Tala?
- It gets bigger
- It gets smaller
- It becomes zero
- It stays the same
A 3 kg cart at 2 m/s is stopped by either foam or wood. What impulse does each bumper give, Zee?
- 6 N·s each
- More from the foam
- More from the wood
- 0 N·s each