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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 126 · 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 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  3. 3.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 380 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  6. 6.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  7. 7.🏋️ A force of 320 N did 2560 J of work. How many metres did the object move?
  8. 8.🏋️ 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?
  9. 9.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  10. 10.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 410 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 2 m took 260 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 500 N did 2000 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 8 m took 560 J of work. What force was used, in newtons?
  18. 18.🏋️ 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?
  19. 19.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  21. 21.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 2 m took 700 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 5 m took 2200 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 400 N did 400 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  35. 35.🏋️ 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?
  36. 36.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 420 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 340 N did 3400 J of work. How many metres did the object move?

Answer key

  1. 3330
  2. 190
  3. 170
  4. 2660
  5. load ÷ effort
  6. less effort
  7. 8
  8. 90
  9. joule (J)
  10. 1
  11. 2870
  12. 180
  13. 130
  14. 3
  15. 4
  16. 180
  17. 70
  18. 510
  19. 250
  20. no, work stays the same
  21. 4
  22. 1550
  23. 750
  24. 350
  25. 440
  26. 1000
  27. 130
  28. 5
  29. 420
  30. 3
  31. 220
  32. 5
  33. 1
  34. 2
  35. 150
  36. 490
  37. 350
  38. 3
  39. 3780
  40. 10

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