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MMLU-Pro / 9528 / A rifle weighing 7 pounds shoots a bullet weighing 1 ounce, giving the bullet a…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A rifle weighing 7 pounds shoots a bullet weighing 1 ounce, giving the bullet a speed of 1120 feet per second. (a) If the rifle is free to move, what is its recoil speed? (b) If the rifle is held tight against the shoulder of a man weighing 133 pounds and if he were free to move, what would be the recoil speed of the rifle and man? (c) If the bullet imbeds itself in a block of wood weighing 3 pounds and 7 ounces and if the block were free to move, what would be the speed of the block plus bullet?

category

physics

options

  1. Recoil speed: 6 ft/sec backwards, 0.2 ft/sec backwards, 12 ft/sec forwards
  2. Recoil speed: 14 ft/sec backwards, 0.8 ft/sec backwards, 22 ft/sec forwards
  3. Recoil speed: 15 ft/sec backwards, 1 ft/sec backwards, 30 ft/sec forwards
  4. Recoil speed: 9 ft/sec backwards, 0.6 ft/sec backwards, 24 ft/sec forwards
  5. Recoil speed: 10 ft/sec backwards, 0.5 ft/sec backwards, 20 ft/sec forwards
  6. Recoil speed: 7 ft/sec backwards, 0.3 ft/sec backwards, 17 ft/sec forwards
  7. Recoil speed: 20 ft/sec backwards, 0.7 ft/sec backwards, 25 ft/sec forwards
  8. Recoil speed: 8 ft/sec backwards, 0.6 ft/sec backwards, 15 ft/sec forwards
  9. Recoil speed: 12 ft/sec backwards, 0.4 ft/sec backwards, 18 ft/sec forwards
  10. Recoil speed: 5 ft/sec backwards, 0.3 ft/sec backwards, 10 ft/sec forwards

src

stemez-Physics

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Source and history

upstream_id / Original problem ID
9528
task_id
fb361b6b-9236-549f-a017-35856b40a70c
task_key
default--test--9528
task_revision_id
1
config / split
default / test

Official source

initial import