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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 857 · 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 longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  2. 2.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 430 N did 860 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ 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?
  6. 6.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 460 N pushes a cart 9 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
  13. 13.🏋️ A force of 150 N did 1200 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 400 N did 3600 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  18. 18.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  23. 23.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  26. 26.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 430 N did 2150 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 460 N did 4600 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A 1 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 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?
  38. 38.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 440 N did 3520 J of work. How many metres did the object move?
  40. 40.🏋️ 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?

Answer key

  1. less effort
  2. 6
  3. 2
  4. 6
  5. 510
  6. 600
  7. 350
  8. 220
  9. 4140
  10. 720
  11. 30
  12. through a distance
  13. 8
  14. 9
  15. 20
  16. 550
  17. joule (J)
  18. 6
  19. 700
  20. 2250
  21. 460
  22. 140
  23. 480
  24. 360
  25. load ÷ effort
  26. 240
  27. 160
  28. 230
  29. 3
  30. 100
  31. 80
  32. 700
  33. 5
  34. 10
  35. 480
  36. 20
  37. 20
  38. 300
  39. 8
  40. 360

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