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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 433 · 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.🏋️ Pushing a crate 2 m took 600 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ 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?
  4. 4.🏋️ Pushing a crate 9 m took 3510 J of work. What force was used, in newtons?
  5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  6. 6.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 4 m took 160 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 340 N pushes a cart 9 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 330 N did 660 J of work. How many metres did the object move?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  16. 16.🏋️ A force of 500 N did 500 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 1 m took 430 J of work. What force was used, in newtons?
  18. 18.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 340 N did 680 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 5 m took 1900 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  29. 29.🏋️ Pushing a crate 7 m took 2030 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 140 N did 560 J of work. How many metres did the object move?
  31. 31.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  32. 32.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 350 N did 2450 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ 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)
  40. 40.🏋️ Pushing a crate 9 m took 2610 J of work. What force was used, in newtons?

Answer key

  1. 300
  2. 4
  3. 70
  4. 390
  5. less effort
  6. no, work stays the same
  7. 750
  8. 40
  9. 500
  10. 3060
  11. 6
  12. 1000
  13. 960
  14. 2
  15. load ÷ effort
  16. 1
  17. 430
  18. 100
  19. 2
  20. 2
  21. 150
  22. 2
  23. 380
  24. 1920
  25. 170
  26. 180
  27. 2
  28. through a distance
  29. 290
  30. 4
  31. joule (J)
  32. 850
  33. 140
  34. 7
  35. 650
  36. 370
  37. 500
  38. 3
  39. 350
  40. 290

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