Elastic and inelastic collisions
Grade 11 Science Worksheet - Challenge Me
Circle the best answer, or write your answer on the line.
A 3 kg cart hits a 1 kg cart at rest and they stick together. What percent of the kinetic energy is kept, Ari?
A 4 kg cart hits a 1 kg cart at rest and they stick together. What percent of the kinetic energy is kept, Bo?
A 1 kg cart hits a 4 kg cart at rest and they stick together. What percent of the kinetic energy is kept, Esme?
Read this first
Collision trials for two carts (example data)
trial kinetic energy before (J) kinetic energy after (J) carts after P 12 12 bounce apart Q 12 8 bounce apart R 12 4 stuck together In the trials table, about what percent of its kinetic energy did trial Q keep, Jun?
- 100%
- About 8%
- About 33%
- About 67%
The carts in the trials table ran on a smooth, level track. Which trials conserved momentum, Kira?
- Just P and Q
- Just trial P
- All three
- None of them
Milo says momentum is lost in an inelastic collision. Agree or disagree?
- Agree: kinetic energy is kept instead
- Disagree: momentum is conserved in both kinds
- Agree: the lost energy is destroyed
- Agree: inelastic means momentum is lost
Noah says kinetic energy is conserved in every collision. Agree or disagree?
- Agree: kinetic energy is always kept
- Disagree: only elastic ones keep it
- Agree: energy can't change form
- Agree: momentum and kinetic energy are the same thing
A 1 kg cart at 4 m/s hits an identical cart at rest in an elastic collision. What happens, Ren?
- Both stop
- The first bounces back at 4 m/s
- Both move at 2 m/s
- The first stops; the second moves at 4 m/s
The same carts stick together instead. What happens, Tala?
- They move at 2 m/s and no energy is lost
- They stop
- They move at 4 m/s and no energy is lost
- They move at 2 m/s and 4 J is lost
Comparing the elastic and the sticking collisions of those carts, what is the same, Zee?
- The total momentum after
- Each cart's speed after
- The kinetic energy after
- Nothing