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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 268 · 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 smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  3. 3.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  4. 4.🏋️ Pushing a crate 6 m took 1560 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 7 m took 1750 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 7 m took 3220 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 290 N pushes a cart 6 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  10. 10.🏋️ 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?
  11. 11.🏋️ Pushing a crate 1 m took 260 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 180 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 410 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 10 m took 1500 J of work. What force was used, in newtons?
  20. 20.🏋️ 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?
  21. 21.🏋️ Pushing a crate 10 m took 3800 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 440 N did 2640 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 480 N did 3360 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  35. 35.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 430 N did 3870 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 3 m took 1050 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 9 m took 2970 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?

Answer key

  1. 850
  2. load ÷ effort
  3. less effort
  4. 260
  5. 250
  6. 270
  7. 460
  8. 1740
  9. through a distance
  10. 240
  11. 260
  12. 540
  13. 2
  14. 1330
  15. 5
  16. 340
  17. 2870
  18. 400
  19. 150
  20. 130
  21. 380
  22. 3
  23. 6
  24. 3
  25. 7
  26. 200
  27. 180
  28. 4
  29. 1000
  30. no, work stays the same
  31. 200
  32. 2580
  33. 540
  34. joule (J)
  35. 2
  36. 9
  37. 310
  38. 350
  39. 330
  40. 5

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