← Stopping in time lesson New set →

Robotics Worksheet: Stopping Distance

Robotics lesson 27: Stopping in time · Set 602 · 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 15 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)?
  2. 2.🛑 A robot is 70 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?
  3. 3.🛑 A robot is 310 cm from a wall. It drives at 50 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?
  4. 4.🛑 Why can a moving robot not stop instantly? (a) it keeps moving a bit (b) it is too light (c) it likes to slide (d) brakes are magic
  5. 5.🛑 A robot is 40 cm from a wall and drives towards it at 5 cm per second. It must stop 30 cm before the wall. For how many seconds can it drive?
  6. 6.🛑 A robot is 100 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?
  7. 7.🛑 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)? =
  8. 8.🛑 Why do robots check their sensors many times a second? (a) to feel tired (b) to waste battery (c) to react in time (d) to look busy
  9. 9.🛑 A robot is 210 cm from a wall. It drives at 50 cm per second until it is 60 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?
  10. 10.🛑 A robot needs 20 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)?
  11. 11.🛑 A robot is 360 cm from a wall. It drives at 50 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?
  12. 12.🛑 A robot is 60 cm from a wall and drives towards it at 5 cm per second. It must stop 10 cm before the wall. For how many seconds can it drive?
  13. 13.🛑 A robot is 110 cm from a wall. It drives at 25 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?
  14. 14.🛑 A robot is 30 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?
  15. 15.🛑 A robot is 175 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?
  16. 16.🛑 A robot is 50 cm from a wall and drives towards it at 5 cm per second. It must stop 30 cm before the wall. For how many seconds can it drive?
  17. 17.🛑 A robot is 185 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?
  18. 18.🛑 A robot is 330 cm from a wall. It drives at 50 cm per second until it is 80 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?
  19. 19.🛑 A robot needs 20 cm to stop once it brakes. It starts braking when its sensor sees a wall 120 cm away. How far from the wall does it stop (in cm)?
  20. 20.🛑 A robot is 110 cm from a wall. It drives at 30 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?
  21. 21.🛑 A robot moves 20 cm every second and checks its distance sensor every 100 ms. How far does it move between two checks (in cm)? =
  22. 22.🛑 A robot moves 30 cm every second and checks its distance sensor every 200 ms. How far does it move between two checks (in cm)? =
  23. 23.🛑 A faster robot needs a … distance to stop. (a) negative (b) zero (c) longer (d) shorter
  24. 24.🛑 A robot is 280 cm from a wall. It drives at 25 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?
  25. 25.🛑 A robot is 90 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?
  26. 26.🛑 A robot is 85 cm from a wall and drives towards it at 5 cm per second. It must stop 30 cm before the wall. For how many seconds can it drive?
  27. 27.🛑 A robot is 260 cm from a wall. It drives at 40 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?
  28. 28.🛑 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 10 cm away. How many seconds does the whole trip take?
  29. 29.🛑 A robot is 90 cm from a wall and drives towards it at 10 cm per second. It must stop 10 cm before the wall. For how many seconds can it drive?
  30. 30.🛑 A robot is 80 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?
  31. 31.🛑 A robot is 20 cm from a wall and drives towards it at 5 cm per second. It must stop 10 cm before the wall. For how many seconds can it drive?
  32. 32.🛑 A robot is 130 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?
  33. 33.🛑 A robot needs 55 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)?
  34. 34.🛑 A robot needs 90 cm to stop once it brakes. It starts braking when its sensor sees a wall 110 cm away. How far from the wall does it stop (in cm)?
  35. 35.🛑 A robot is 250 cm from a wall. It drives at 25 cm per second until it is 50 cm away, then slows to 10 cm per second and stops when it is 20 cm away. How many seconds does the whole trip take?
  36. 36.🛑 A robot is 30 cm from a wall and drives towards it at 5 cm per second. It must stop 10 cm before the wall. For how many seconds can it drive?
  37. 37.🛑 A robot needs 30 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)?
  38. 38.🛑 A robot is 320 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 10 cm away. How many seconds does the whole trip take?
  39. 39.🛑 A robot is 140 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?
  40. 40.🛑 A robot needs 5 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)?

Answer key

  1. 25
  2. 3
  3. 15
  4. it keeps moving a bit
  5. 2
  6. 4
  7. 25
  8. to react in time
  9. 11
  10. 80
  11. 16
  12. 10
  13. 7
  14. 2
  15. 11
  16. 4
  17. 11
  18. 19
  19. 100
  20. 8
  21. 2
  22. 6
  23. longer
  24. 20
  25. 4
  26. 11
  27. 13
  28. 19
  29. 8
  30. 12
  31. 2
  32. 5
  33. 25
  34. 20
  35. 11
  36. 4
  37. 20
  38. 22
  39. 8
  40. 125

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids