Compare designs that reduce the force in a collision
Grade 11 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
A 3 kg toy cart at 3 m/s is stopped by a bumper in 0.45 s. What is the average force on it, Esme?
In the bumper table, which bumper gives the smallest average force, Jun?
- D, thick foam
- C, wood, since it stops fastest
- B, spring
In the bumper table, why is the wood bumper's force the biggest, Kira?
Use the picture in question 2.
- It stops the cart fastest
- It stops the cart most slowly
- It adds the most mass
In the bumper table, which bumper bounces the cart back, Luz?
Use the picture in question 2.
- A, foam
- D, thick foam
- B, spring
Why does a soft bumper lower the force on a stopping cart, Milo?
- It removes the cart's momentum for free
- It makes the stop take longer
- It makes the stop quicker
Compared with stopping a cart, what does bouncing it back do to the change in momentum, Noah?
- Makes it bigger
- Makes it smaller, so it is gentler
- Leaves it the same
What does a bumper that squashes slowly do to the stopping time, Pia?
- Makes it zero
- Lengthens it
- Shortens it
A bumper may add at most 100 g to the cart. Is that a criterion or a constraint, Ren?
- Neither
- A criterion
- A constraint
'The lower the force, the better' describes a design goal. Is that a criterion or a constraint, Tala?
- A criterion
- A test result
- A constraint
Using the bumper table, which bumper keeps the force under 50 N and adds no more than 100 g, Zee?
- C, wood
- A, foam
- D, thick foam