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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 469 · 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 force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 260 N did 1560 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 420 N did 3360 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 3 m took 450 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  6. 6.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 430 N did 1720 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  9. 9.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  10. 10.🏋️ A force of 340 N did 2040 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 460 N did 1380 J of work. How many metres did the object move?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  13. 13.🏋️ Pushing a crate 6 m took 1620 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 10 m took 4300 J of work. What force was used, in newtons?
  15. 15.🏋️ 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?
  16. 16.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ 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)
  18. 18.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 490 N pushes a cart 4 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  23. 23.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  24. 24.🏋️ 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?
  25. 25.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  27. 27.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 360 N did 2880 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 320 N did 2240 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  38. 38.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  40. 40.🏋️ 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?

Answer key

  1. 480
  2. 6
  3. 8
  4. 150
  5. 130
  6. 20
  7. 4
  8. 20
  9. joule (J)
  10. 6
  11. 3
  12. load ÷ effort
  13. 270
  14. 430
  15. 30
  16. 120
  17. 400
  18. 700
  19. 3360
  20. 410
  21. 1960
  22. no, work stays the same
  23. less effort
  24. 150
  25. 3
  26. 2
  27. 4
  28. 8
  29. 7
  30. 100
  31. 10
  32. 1000
  33. 4
  34. 2
  35. 700
  36. 5
  37. through a distance
  38. 1
  39. 2
  40. 240

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