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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 485 · 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 10 m took 3200 J of work. What force was used, in newtons?
  2. 2.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  3. 3.🏋️ A force of 360 N did 2520 J of work. How many metres did the object move?
  4. 4.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 240 N did 240 J of work. How many metres did the object move?
  7. 7.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Pushing a crate 4 m took 1000 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 430 N did 860 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 310 N did 1550 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  14. 14.🏋️ A force of 370 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 20 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  26. 26.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  27. 27.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 360 N pushes a cart 6 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 440 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 500 N did 4500 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 140 N did 840 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 290 N pushes a cart 6 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?

Answer key

  1. 320
  2. joule (J)
  3. 7
  4. 10
  5. 6
  6. 1
  7. 190
  8. 250
  9. 2
  10. 5
  11. 2
  12. 330
  13. load ÷ effort
  14. 2590
  15. 600
  16. 90
  17. 2
  18. 760
  19. 7
  20. 80
  21. 390
  22. 270
  23. 5
  24. 40
  25. less effort
  26. through a distance
  27. 750
  28. 150
  29. 2160
  30. 650
  31. 3080
  32. 10
  33. 10
  34. 40
  35. 9
  36. 1760
  37. 100
  38. 6
  39. 1740
  40. 6

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