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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 180 · 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.

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  1. 1.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 310 N did 310 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 7 m took 630 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 260 N did 520 J of work. How many metres did the object move?
  11. 11.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  13. 13.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ 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?
  15. 15.🏋️ A force of 330 N did 1980 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 490 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ 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?
  23. 23.🏋️ A 4 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 2 m took 260 J of work. What force was used, in newtons?
  25. 25.🏋️ 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?
  26. 26.🏋️ Pushing a crate 8 m took 2960 J of work. What force was used, in newtons?
  27. 27.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  30. 30.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  31. 31.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  32. 32.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 8 m took 2880 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 240 N did 2160 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 5 m took 2050 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 450 N did 3600 J of work. How many metres did the object move?

Answer key

  1. 3
  2. 5
  3. 1
  4. 90
  5. 300
  6. 2
  7. 750
  8. 630
  9. 4
  10. 2
  11. 450
  12. joule (J)
  13. 6
  14. 30
  15. 6
  16. 90
  17. 1960
  18. 220
  19. 150
  20. 900
  21. 1380
  22. 510
  23. 120
  24. 130
  25. 160
  26. 370
  27. 70
  28. 100
  29. no, work stays the same
  30. load ÷ effort
  31. through a distance
  32. 3920
  33. 360
  34. 2310
  35. 9
  36. 410
  37. 6
  38. 120
  39. 2
  40. 8

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