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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 744 · 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.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 380 N pushes a cart 5 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 60 N did 600 J of work. How many metres did the object move?
  5. 5.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  6. 6.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 140 N did 1260 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 180 N did 1440 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  18. 18.🏋️ A force of 220 N did 660 J of work. How many metres did the object move?
  19. 19.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  20. 20.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
  21. 21.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  22. 22.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 360 N did 2160 J of work. How many metres did the object move?
  24. 24.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 20 N did 160 J of work. How many metres did the object move?
  26. 26.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  28. 28.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 5 m took 1050 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ 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?
  37. 37.🏋️ A force of 270 N did 2160 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 5 m took 650 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?

Answer key

  1. 50
  2. 1900
  3. 4
  4. 10
  5. through a distance
  6. 20
  7. 9
  8. 1550
  9. 6
  10. 50
  11. 550
  12. 7
  13. 8
  14. 440
  15. 3
  16. 1200
  17. load ÷ effort
  18. 3
  19. joule (J)
  20. 7
  21. no, work stays the same
  22. 60
  23. 6
  24. 140
  25. 8
  26. 280
  27. less effort
  28. 8
  29. 150
  30. 440
  31. 4
  32. 8
  33. 210
  34. 550
  35. 200
  36. 360
  37. 8
  38. 130
  39. 150
  40. 40

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