← Stopping in time lesson New set →

Robotics Worksheet: Stopping Distance

Robotics lesson 27: Stopping in time · Set 31 · 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 moves 20 cm every second and checks its distance sensor every 250 ms. How far does it move between two checks (in cm)? =
  2. 2.🛑 A faster robot needs a … distance to stop. (a) longer (b) negative (c) zero (d) shorter
  3. 3.🛑 Why can a moving robot not stop instantly? (a) it likes to slide (b) brakes are magic (c) it is too light (d) it keeps moving a bit
  4. 4.🛑 A robot is 70 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?
  5. 5.🛑 When should a robot start slowing down? (a) after hitting the wall (b) never (c) before it is too close (d) only when it is off
  6. 6.🛑 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?
  7. 7.🛑 A robot moves 30 cm every second and checks its distance sensor every 250 ms. How far does it move between two checks (in cm)? =
  8. 8.🛑 A robot is 290 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?
  9. 9.🛑 A robot is 40 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?
  10. 10.🛑 A robot is 85 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?
  11. 11.🛑 A robot moves 20 cm every second and checks its distance sensor every 500 ms. How far does it move between two checks (in cm)? =
  12. 12.🛑 A robot moves 30 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 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?
  14. 14.🛑 A robot needs 145 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)?
  15. 15.🛑 A robot moves 40 cm every second and checks its distance sensor every 100 ms. How far does it move between two checks (in cm)? =
  16. 16.🛑 A robot needs 40 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)?
  17. 17.🛑 A robot needs 85 cm to stop once it brakes. It starts braking when its sensor sees a wall 140 cm away. How far from the wall does it stop (in cm)?
  18. 18.🛑 A robot needs 25 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)?
  19. 19.🛑 A robot is 450 cm from a wall. It drives at 50 cm per second until it is 50 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?
  20. 20.🛑 A robot needs 55 cm to stop once it brakes. It starts braking when its sensor sees a wall 140 cm away. How far from the wall does it stop (in cm)?
  21. 21.🛑 A robot is 70 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?
  22. 22.🛑 A robot moves 40 cm every second and checks its distance sensor every 250 ms. How far does it move between two checks (in cm)? =
  23. 23.🛑 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?
  24. 24.🛑 A robot is 220 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 20 cm away. How many seconds does the whole trip take?
  25. 25.🛑 A robot moves 50 cm every second and checks its distance sensor every 200 ms. How far does it move between two checks (in cm)? =
  26. 26.🛑 A robot needs 5 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)?
  27. 27.🛑 A robot moves 10 cm every second and checks its distance sensor every 100 ms. How far does it move between two checks (in cm)? =
  28. 28.🛑 Why do robots check their sensors many times a second? (a) to waste battery (b) to feel tired (c) to look busy (d) to react in time
  29. 29.🛑 A robot needs 15 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)?
  30. 30.🛑 A robot is 240 cm from a wall. It drives at 20 cm per second until it is 100 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?
  31. 31.🛑 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 20 cm away. How many seconds does the whole trip take?
  32. 32.🛑 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?
  33. 33.🛑 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)?
  34. 34.🛑 A robot is 190 cm from a wall. It drives at 30 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?
  35. 35.🛑 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)? =
  36. 36.🛑 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?
  37. 37.🛑 A robot is 55 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?
  38. 38.🛑 A robot is 150 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?
  39. 39.🛑 A robot is 175 cm from a wall. It drives at 25 cm per second until it is 100 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?
  40. 40.🛑 A robot is 190 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?

Answer key

  1. 5
  2. longer
  3. it keeps moving a bit
  4. 10
  5. before it is too close
  6. 8
  7. 7.5
  8. 21
  9. 3
  10. 5
  11. 10
  12. 15
  13. 3
  14. 5
  15. 4
  16. 60
  17. 55
  18. 15
  19. 12
  20. 85
  21. 8
  22. 10
  23. 14
  24. 8
  25. 10
  26. 115
  27. 1
  28. to react in time
  29. 45
  30. 23
  31. 6
  32. 11
  33. 25
  34. 12
  35. 3
  36. 5
  37. 5
  38. 6
  39. 21
  40. 12

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