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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 454 · 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 120 N did 720 J of work. How many metres did the object move?
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  3. 3.🏋️ A force of 180 N did 1620 J of work. How many metres did the object move?
  4. 4.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ 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
  7. 7.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 70 N pushes a cart 7 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  11. 11.🏋️ A force of 200 N pushes a cart 9 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 220 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 400 N pushes a cart 9 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 4 m took 1160 J of work. What force was used, in newtons?
  16. 16.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  17. 17.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 7 m took 1190 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 340 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ 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?
  24. 24.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 3 m took 300 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ An 11 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.🏋️ Pushing a crate 2 m took 680 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 180 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 6
  2. through a distance
  3. 9
  4. 1000
  5. 550
  6. no, work stays the same
  7. 400
  8. 6
  9. 490
  10. load ÷ effort
  11. 1800
  12. 5
  13. 660
  14. 3600
  15. 290
  16. joule (J)
  17. 200
  18. 120
  19. 170
  20. 2380
  21. 50
  22. 3
  23. 10
  24. 10
  25. 650
  26. 940
  27. 250
  28. 230
  29. 3920
  30. 80
  31. 4
  32. 2
  33. 100
  34. 800
  35. 440
  36. 340
  37. 60
  38. 130
  39. 800
  40. 540

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