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Robotics Worksheet: Robot Batteries

Robotics lesson 4: Power for robots · Set 911 · 40 questions
TalentJR

Robot tip (Holds ÷ uses): Hours = capacity in mAh ÷ current in mA (2000 mAh ÷ 500 mA = 4 hours). Percent: blocks = 100% ÷ % used per block; time = blocks × minutes per block. Cells in series add up: 4 cells of 1.5 V give 6 V.

NameDateTime takenScore ___ / 40
  1. 1.🔋 A robot uses 10% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  2. 2.🔋 A robot’s battery is at 50% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  3. 3.🔋 A robot’s battery is at 0% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
  4. 4.🔋 What does a robot vacuum do when its battery is low? (a) keeps going for ever (b) goes back to its dock (c) explodes (d) turns into a car
  5. 5.🔋 A robot’s battery is at 75% and charging adds 25% every 10 minutes. How many minutes until it is full (100%)?
  6. 6.🔋 A robot uses 4% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  7. 7.🔋 A robot uses 5% of its battery every 1 minute. How many minutes does a full battery (100%) last?
  8. 8.🔋 A robot’s battery is at 75%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  9. 9.🔋 A robot uses 2% of its battery every 3 minutes. How many minutes does a full battery (100%) last?
  10. 10.🔋 A robot’s battery is at 70%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  11. 11.🔋 A robot’s battery holds 1500 mAh and the robot uses 250 mA. For how many hours can it run?
  12. 12.🔋 A robot’s battery holds 2000 mAh and the robot uses 400 mA. For how many hours can it run?
  13. 13.🔋 What powers most moving robots? (a) a tiny magnet (b) a rechargeable battery (c) a water tank (d) a candle
  14. 14.🔋 A robot’s battery holds 500 mAh and the robot uses 250 mA. For how many hours can it run?
  15. 15.🔋 A robot’s battery holds 2000 mAh and the robot uses 250 mA. For how many hours can it run?
  16. 16.🔋 A robot uses 20% of its battery every 2 minutes. How many minutes does a full battery (100%) last?
  17. 17.🔋 A robot’s battery is at 50%. Each lap of the track uses 25%. How many laps can it do before the battery reaches 0%?
  18. 18.🔋 A robot uses 20% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  19. 19.🔋 A robot’s battery is at 40%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  20. 20.🔋 A robot uses 5% of its battery every 4 minutes. How many minutes does a full battery (100%) last?
  21. 21.🔋 A robot’s battery holds 1000 mAh and the robot uses 500 mA. For how many hours can it run?
  22. 22.🔋 A robot’s battery holds 1600 mAh and the robot uses 200 mA. For how many hours can it run?
  23. 23.🔋 A robot uses 25% of its battery every 5 minutes. How many minutes does a full battery (100%) last?
  24. 24.🔋 A robot runs on 4 cells of 1.5 V joined in series. What is the total voltage (in volts)? =
  25. 25.🔋 Many robots on far-away planets get energy from … (a) sunlight (solar panels) (b) wind-up keys (c) shop batteries (d) petrol pumps
  26. 26.🔋 A robot’s battery is at 40%. Each lap of the track uses 10%. How many laps can it do before the battery reaches 0%?
  27. 27.🔋 A robot’s battery is at 100%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  28. 28.🔋 A robot’s battery is at 100%. Each lap of the track uses 5%. How many laps can it do before the battery reaches 0%?
  29. 29.🔋 A robot’s battery is at 80%. Each lap of the track uses 20%. How many laps can it do before the battery reaches 0%?
  30. 30.🔋 A robot’s battery is at 50% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  31. 31.🔋 A robot’s battery is at 45% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?
  32. 32.🔋 A robot’s battery holds 2800 mAh and the robot uses 400 mA. For how many hours can it run?
  33. 33.🔋 A robot’s battery holds 800 mAh and the robot uses 400 mA. For how many hours can it run?
  34. 34.🔋 Battery capacity (how much it holds) is often written in … (a) mAh (b) km (c) °C (d) kg
  35. 35.🔋 A robot’s battery holds 600 mAh and the robot uses 100 mA. For how many hours can it run?
  36. 36.🔋 A robot uses 4% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  37. 37.🔋 A robot’s battery holds 250 mAh and the robot uses 250 mA. For how many hours can it run?
  38. 38.🔋 A robot’s battery holds 300 mAh and the robot uses 100 mA. For how many hours can it run?
  39. 39.🔋 A robot uses 20% of its battery every 6 minutes. How many minutes does a full battery (100%) last?
  40. 40.🔋 A robot’s battery is at 55% and charging adds 5% every 10 minutes. How many minutes until it is full (100%)?

Answer key

  1. 50
  2. 20
  3. 50
  4. goes back to its dock
  5. 10
  6. 125
  7. 20
  8. 3
  9. 150
  10. 14
  11. 6
  12. 5
  13. a rechargeable battery
  14. 2
  15. 8
  16. 10
  17. 2
  18. 20
  19. 8
  20. 80
  21. 2
  22. 8
  23. 20
  24. 6
  25. sunlight (solar panels)
  26. 4
  27. 5
  28. 20
  29. 4
  30. 100
  31. 110
  32. 7
  33. 2
  34. mAh
  35. 6
  36. 150
  37. 1
  38. 3
  39. 30
  40. 90

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