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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 408 · 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.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  2. 2.🏋️ Pushing a crate 8 m took 2880 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 420 N pushes a cart 8 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  6. 6.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  7. 7.🏋️ A force of 220 N pushes a cart 3 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 300 N pushes a cart 9 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 350 N did 2450 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  14. 14.🏋️ A force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 410 N did 2460 J of work. How many metres did the object move?
  18. 18.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  20. 20.🏋️ 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?
  21. 21.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  22. 22.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  23. 23.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  24. 24.🏋️ 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?
  25. 25.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 5 m took 450 J of work. What force was used, in newtons?
  29. 29.🏋️ 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?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 20 N did 100 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. joule (J)
  2. 360
  3. 3360
  4. 700
  5. load ÷ effort
  6. less effort
  7. 660
  8. 5
  9. 2700
  10. 7
  11. 460
  12. 140
  13. no, work stays the same
  14. 2250
  15. 6
  16. 3600
  17. 6
  18. 6
  19. 320
  20. 140
  21. 190
  22. through a distance
  23. 40
  24. 160
  25. 4
  26. 100
  27. 350
  28. 90
  29. 1000
  30. 850
  31. 450
  32. 550
  33. 410
  34. 280
  35. 240
  36. 8
  37. 5
  38. 2
  39. 750
  40. 550

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