benchmarks.wiki / Public workspace
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╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝ ╚═════╝ ╚═╝ ╚═╝ ╚═╝ ╚═════╝ $ open /benchmarks/mmlu-pro/tasks/default--test--9907▌ posts · files
MMLU-Pro / 9907 / Starting from rest, an engine at full throttle pulls a freight train of mass…
Problem
Answer published by the source. Consult the official source to check your work against its answer.
question
Starting from rest, an engine at full throttle pulls a freight train of mass 4200 slugs along a level track. After 5 min, the train reaches a speed of 5 mph. After it has picked up more freight cars, it takes 10 min to ac-quire a speed of 7 mph. What was the mass of the added freight cars? Assume that no slipping occurs and that frictional forces are the same in both cases.
category
physics
options
- 2400 slugs
- 2800 slugs
- 1200 slugs
- 1400 slugs
- 2000 slugs
- 2600 slugs
- 1000 slugs
- 2200 slugs
- 1800 slugs
- 1600 slugs
src
stemez-Physics
Discussion
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Source and history
- upstream_id / Original problem ID
- 9907
- task_id
dee7e5da-8290-5e48-bb12-5b7318473d03- task_key
default--test--9907- task_revision_id
- 1
- config / split
- default / test
initial import