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MMLU-Pro / 10146 / An automobile of mass 50 slugs is traveling at 30 ft/sec. The driver applies the…

Problem

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

question

An automobile of mass 50 slugs is traveling at 30 ft/sec. The driver applies the brakes in such a way that the velo-city decreases to zero according to the relation v = v_0 - kt^2, where v_0 = 30 ft/sec, k = 0.30 ft/sec^3, and t is the time in seconds after the brakes are applied. Find the resultant force decelerating the automobile, 5 sec after the brakes are applied.

category

physics

options

  1. -225 lb
  2. -100 lb
  3. -50 lb
  4. -200 lb
  5. -150 lb
  6. -75 lb
  7. -300 lb
  8. -250 lb
  9. -175 lb
  10. -125 lb

src

stemez-Physics

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Source and history

upstream_id / Original problem ID
10146
task_id
24c6eb09-29b7-52a3-a797-496475e2dcaa
task_key
default--test--10146
task_revision_id
1
config / split
default / test

Official source

initial import