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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 623 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  3. 3.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  9. 9.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 390 N did 1560 J of work. How many metres did the object move?
  11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  16. 16.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  18. 18.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  19. 19.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  21. 21.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  25. 25.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 80 N did 240 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 270 N did 1080 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 240 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 70 N did 210 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 250 N pushes a cart 8 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 290 N pushes a cart 5 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 640
  2. no, work stays the same
  3. 1380
  4. 410
  5. 2
  6. 5
  7. 900
  8. 180
  9. 240
  10. 4
  11. 700
  12. 220
  13. 310
  14. 110
  15. through a distance
  16. 1
  17. 4
  18. less effort
  19. 200
  20. joule (J)
  21. 40
  22. 760
  23. 150
  24. 230
  25. 360
  26. 3
  27. 2
  28. 4
  29. 300
  30. 1440
  31. 600
  32. 5
  33. 3
  34. 2000
  35. 6
  36. 3
  37. 2
  38. 350
  39. 1450
  40. 510

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