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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 837 · 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 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 4 m took 1920 J of work. What force was used, in newtons?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  4. 4.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  7. 7.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 220 N did 220 J of work. How many metres did the object move?
  9. 9.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 190 N did 950 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 2 m took 640 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  14. 14.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  18. 18.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 230 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 40 N did 360 J of work. How many metres did the object move?
  23. 23.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 2 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 260 N pushes a cart 6 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  31. 31.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  35. 35.🏋️ 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?
  36. 36.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 410 N pushes a cart 3 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 5
  2. 480
  3. load ÷ effort
  4. 840
  5. 350
  6. joule (J)
  7. 250
  8. 1
  9. 650
  10. 5
  11. 320
  12. 1350
  13. through a distance
  14. 3500
  15. 200
  16. 150
  17. less effort
  18. 380
  19. 450
  20. 230
  21. 370
  22. 9
  23. 190
  24. 2080
  25. 460
  26. 80
  27. 1560
  28. 3
  29. 2
  30. no, work stays the same
  31. 540
  32. 1
  33. 3400
  34. 1040
  35. 120
  36. 2
  37. 1230
  38. 5
  39. 800
  40. 500

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