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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 546 · 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 380 N did 1520 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 490 N did 4900 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 320 N pushes a cart 8 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
  8. 8.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  10. 10.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 470 N did 470 J of work. How many metres did the object move?
  13. 13.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 270 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  22. 22.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  25. 25.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ 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?
  27. 27.🏋️ Pushing a crate 5 m took 1650 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 330 N did 660 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  30. 30.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  31. 31.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 430 N did 3870 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
  37. 37.🏋️ 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?
  38. 38.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?

Answer key

  1. 4
  2. 2
  3. 10
  4. 7
  5. 60
  6. 2560
  7. 5
  8. 200
  9. load ÷ effort
  10. 3
  11. 3
  12. 1
  13. through a distance
  14. 50
  15. 140
  16. 5
  17. 90
  18. 460
  19. 950
  20. 2160
  21. no, work stays the same
  22. 150
  23. 400
  24. less effort
  25. 600
  26. 120
  27. 330
  28. 2
  29. 380
  30. joule (J)
  31. 650
  32. 1240
  33. 9
  34. 1
  35. 4500
  36. 140
  37. 800
  38. 400
  39. 200
  40. 4

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