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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 306 · 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 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
  3. 3.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  6. 6.🏋️ A force of 60 N did 240 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  8. 8.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  9. 9.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
  10. 10.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  11. 11.🏋️ A force of 250 N did 750 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 210 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Pushing a crate 4 m took 320 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 190 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 460 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 470 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  24. 24.🏋️ Pushing a crate 9 m took 180 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 3 m took 1380 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 360 N did 720 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 4 m took 1800 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Pushing a crate 4 m took 1760 J of work. What force was used, in newtons?
  31. 31.🏋️ 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)
  32. 32.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  38. 38.🏋️ A force of 460 N did 920 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  40. 40.🏋️ 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?

Answer key

  1. 130
  2. 150
  3. 100
  4. 450
  5. load ÷ effort
  6. 4
  7. 10
  8. less effort
  9. 5
  10. joule (J)
  11. 3
  12. 210
  13. 5
  14. 560
  15. 80
  16. 4
  17. 2
  18. 6
  19. 1140
  20. 3220
  21. 800
  22. 4230
  23. through a distance
  24. 20
  25. 460
  26. 2
  27. 450
  28. 110
  29. 2
  30. 440
  31. 650
  32. 60
  33. 350
  34. 3
  35. 4
  36. 2
  37. no, work stays the same
  38. 2
  39. 290
  40. 190

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