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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 696 · 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 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)
  2. 2.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  4. 4.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  5. 5.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  8. 8.🏋️ A force of 350 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 200 N did 2000 J of work. How many metres did the object move?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  13. 13.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 220 N did 1320 J of work. How many metres did the object move?
  15. 15.🏋️ 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?
  16. 16.🏋️ A force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  19. 19.🏋️ A force of 60 N did 240 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 440 N did 3520 J of work. How many metres did the object move?
  23. 23.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 8 m took 3520 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 230 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 7 m took 3430 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 6 m took 60 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 2 m took 840 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 180 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 110 N did 660 J of work. How many metres did the object move?

Answer key

  1. 750
  2. 3330
  3. load ÷ effort
  4. joule (J)
  5. 180
  6. 850
  7. less effort
  8. 1750
  9. 8
  10. 140
  11. 10
  12. no, work stays the same
  13. 650
  14. 6
  15. 240
  16. 180
  17. 300
  18. through a distance
  19. 4
  20. 3
  21. 330
  22. 8
  23. 900
  24. 440
  25. 750
  26. 800
  27. 1840
  28. 1050
  29. 490
  30. 10
  31. 3
  32. 1380
  33. 5
  34. 420
  35. 400
  36. 3
  37. 900
  38. 20
  39. 4
  40. 6

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