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Robotics Worksheet: Stopping Distance

Robotics lesson 27: Stopping in time · Set 58 · 40 questions
TalentJR

Robot tip (Room ÷ speed): Room = distance now − gap to keep; time = room ÷ speed. Stopping point = distance when braking starts − braking distance. Distance between sensor checks = speed × time between checks (ms ÷ 1000 for seconds).

NameDateTime takenScore ___ / 40
  1. 1.🛑 A robot needs 50 cm to stop once it brakes. It starts braking when its sensor sees a wall 130 cm away. How far from the wall does it stop (in cm)?
  2. 2.🛑 A faster robot needs a … distance to stop. (a) shorter (b) zero (c) negative (d) longer
  3. 3.🛑 A robot is 80 cm from a wall and drives towards it at 10 cm per second. It must stop 30 cm before the wall. For how many seconds can it drive?
  4. 4.🛑 A robot needs 35 cm to stop once it brakes. It starts braking when its sensor sees a wall 40 cm away. How far from the wall does it stop (in cm)?
  5. 5.🛑 A robot needs 75 cm to stop once it brakes. It starts braking when its sensor sees a wall 90 cm away. How far from the wall does it stop (in cm)?
  6. 6.🛑 Why can a moving robot not stop instantly? (a) it keeps moving a bit (b) it is too light (c) brakes are magic (d) it likes to slide
  7. 7.🛑 A robot is 300 cm from a wall. It drives at 40 cm per second until it is 60 cm away, then slows to 10 cm per second and stops when it is 10 cm away. How many seconds does the whole trip take?
  8. 8.🛑 A robot moves 50 cm every second and checks its distance sensor every 100 ms. How far does it move between two checks (in cm)? =
  9. 9.🛑 A robot needs 25 cm to stop once it brakes. It starts braking when its sensor sees a wall 50 cm away. How far from the wall does it stop (in cm)?
  10. 10.🛑 A robot is 150 cm from a wall and drives towards it at 20 cm per second. It must stop 10 cm before the wall. For how many seconds can it drive?
  11. 11.🛑 When should a robot start slowing down? (a) before it is too close (b) only when it is off (c) after hitting the wall (d) never
  12. 12.🛑 A robot moves 50 cm every second and checks its distance sensor every 500 ms. How far does it move between two checks (in cm)? =
  13. 13.🛑 A robot needs 30 cm to stop once it brakes. It starts braking when its sensor sees a wall 40 cm away. How far from the wall does it stop (in cm)?
  14. 14.🛑 Why do robots check their sensors many times a second? (a) to feel tired (b) to react in time (c) to waste battery (d) to look busy
  15. 15.🛑 A robot is 290 cm from a wall. It drives at 40 cm per second until it is 50 cm away, then slows to 5 cm per second and stops when it is 20 cm away. How many seconds does the whole trip take?
  16. 16.🛑 A robot moves 30 cm every second and checks its distance sensor every 100 ms. How far does it move between two checks (in cm)? =
  17. 17.🛑 A robot needs 120 cm to stop once it brakes. It starts braking when its sensor sees a wall 130 cm away. How far from the wall does it stop (in cm)?
  18. 18.🛑 A robot is 260 cm from a wall. It drives at 30 cm per second until it is 80 cm away, then slows to 5 cm per second and stops when it is 20 cm away. How many seconds does the whole trip take?
  19. 19.🛑 A robot is 40 cm from a wall and drives towards it at 15 cm per second. It must stop 10 cm before the wall. For how many seconds can it drive?
  20. 20.🛑 A robot needs 50 cm to stop once it brakes. It starts braking when its sensor sees a wall 150 cm away. How far from the wall does it stop (in cm)?
  21. 21.🛑 A robot is 110 cm from a wall and drives towards it at 15 cm per second. It must stop 20 cm before the wall. For how many seconds can it drive?
  22. 22.🛑 A robot needs 10 cm to stop once it brakes. It starts braking when its sensor sees a wall 40 cm away. How far from the wall does it stop (in cm)?
  23. 23.🛑 A robot is 160 cm from a wall and drives towards it at 20 cm per second. It must stop 20 cm before the wall. For how many seconds can it drive?
  24. 24.🛑 A robot is 70 cm from a wall and drives towards it at 20 cm per second. It must stop 30 cm before the wall. For how many seconds can it drive?
  25. 25.🛑 A robot needs 75 cm to stop once it brakes. It starts braking when its sensor sees a wall 100 cm away. How far from the wall does it stop (in cm)?
  26. 26.🛑 A robot needs 70 cm to stop once it brakes. It starts braking when its sensor sees a wall 130 cm away. How far from the wall does it stop (in cm)?
  27. 27.🛑 A robot needs 5 cm to stop once it brakes. It starts braking when its sensor sees a wall 60 cm away. How far from the wall does it stop (in cm)?
  28. 28.🛑 A robot is 60 cm from a wall and drives towards it at 5 cm per second. It must stop 20 cm before the wall. For how many seconds can it drive?
  29. 29.🛑 A robot is 200 cm from a wall. It drives at 50 cm per second until it is 100 cm away, then slows to 10 cm per second and stops when it is 10 cm away. How many seconds does the whole trip take?
  30. 30.🛑 A robot moves 10 cm every second and checks its distance sensor every 500 ms. How far does it move between two checks (in cm)? =
  31. 31.🛑 A robot is 225 cm from a wall. It drives at 25 cm per second until it is 100 cm away, then slows to 10 cm per second and stops when it is 10 cm away. How many seconds does the whole trip take?
  32. 32.🛑 A robot is 180 cm from a wall. It drives at 20 cm per second until it is 60 cm away, then slows to 10 cm per second and stops when it is 10 cm away. How many seconds does the whole trip take?
  33. 33.🛑 A robot is 230 cm from a wall. It drives at 30 cm per second until it is 80 cm away, then slows to 10 cm per second and stops when it is 10 cm away. How many seconds does the whole trip take?
  34. 34.🛑 A robot is 150 cm from a wall. It drives at 30 cm per second until it is 60 cm away, then slows to 5 cm per second and stops when it is 10 cm away. How many seconds does the whole trip take?
  35. 35.🛑 A robot needs 50 cm to stop once it brakes. It starts braking when its sensor sees a wall 90 cm away. How far from the wall does it stop (in cm)?
  36. 36.🛑 A robot needs 40 cm to stop once it brakes. It starts braking when its sensor sees a wall 150 cm away. How far from the wall does it stop (in cm)?
  37. 37.🛑 A robot needs 35 cm to stop once it brakes. It starts braking when its sensor sees a wall 80 cm away. How far from the wall does it stop (in cm)?
  38. 38.🛑 A robot is 180 cm from a wall. It drives at 20 cm per second until it is 80 cm away, then slows to 5 cm per second and stops when it is 20 cm away. How many seconds does the whole trip take?
  39. 39.🛑 A robot needs 10 cm to stop once it brakes. It starts braking when its sensor sees a wall 70 cm away. How far from the wall does it stop (in cm)?
  40. 40.🛑 A robot moves 10 cm every second and checks its distance sensor every 200 ms. How far does it move between two checks (in cm)? =

Answer key

  1. 80
  2. longer
  3. 5
  4. 5
  5. 15
  6. it keeps moving a bit
  7. 11
  8. 5
  9. 25
  10. 7
  11. before it is too close
  12. 25
  13. 10
  14. to react in time
  15. 12
  16. 3
  17. 10
  18. 18
  19. 2
  20. 100
  21. 6
  22. 30
  23. 7
  24. 2
  25. 25
  26. 60
  27. 55
  28. 8
  29. 11
  30. 5
  31. 14
  32. 11
  33. 12
  34. 13
  35. 40
  36. 110
  37. 45
  38. 17
  39. 60
  40. 2

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