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 2 kg toy cart at 3 m/s is stopped by a bumper in 0.2 s. What is the average force on it, Ari?
A 0.5 kg toy cart at 8 m/s is stopped by a bumper in 0.05 s. What is the average force on it, Bo?
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 bounces the cart back, Luz?
- D, thick foam
- A, foam
- B, spring
Why does a soft bumper lower the force on a stopping cart, Milo?
- It makes the stop take longer
- It makes the stop quicker
- It removes the cart's momentum for free
Compared with stopping a cart, what does bouncing it back do to the change in momentum, Noah?
- Leaves it the same
- Makes it bigger
- Makes it smaller, so it is gentler
What does a bumper that squashes slowly do to the stopping time, Pia?
- Shortens it
- Lengthens it
- Makes it zero
A bumper may add at most 100 g to the cart. Is that a criterion or a constraint, Ren?
- A constraint
- Neither
- A criterion
'The lower the force, the better' describes a design goal. Is that a criterion or a constraint, Tala?
- A criterion
- A constraint
- A test result
Using the bumper table, which bumper keeps the force under 50 N and adds no more than 100 g, Zee?
- D, thick foam
- C, wood
- A, foam