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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 776 · 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 machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 50 N did 450 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 160 N did 1440 J of work. How many metres did the object move?
  5. 5.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  6. 6.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  9. 9.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  11. 11.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  14. 14.🏋️ 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?
  15. 15.🏋️ 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?
  16. 16.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 220 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ 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?
  19. 19.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 150 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 130 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 430 N did 4300 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 30 N did 240 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ 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)
  27. 27.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 430 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 220 N did 1320 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?

Answer key

  1. 3
  2. 9
  3. 960
  4. 9
  5. less effort
  6. 6
  7. 600
  8. through a distance
  9. no, work stays the same
  10. load ÷ effort
  11. 130
  12. 1000
  13. 8
  14. 200
  15. 10
  16. 8
  17. 880
  18. 480
  19. 3
  20. 750
  21. 2
  22. 780
  23. 10
  24. 8
  25. 6
  26. 100
  27. 90
  28. 860
  29. 330
  30. 50
  31. 850
  32. 6
  33. 600
  34. 3
  35. 100
  36. 160
  37. 9
  38. 2
  39. 6
  40. 3

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