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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 402 · 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.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  2. 2.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  4. 4.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Pushing a crate 8 m took 2240 J of work. What force was used, in newtons?
  7. 7.🏋️ 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)
  8. 8.🏋️ A force of 330 N pushes a cart 9 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 250 N did 2000 J of work. How many metres did the object move?
  10. 10.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  13. 13.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ 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?
  15. 15.🏋️ Pushing a crate 7 m took 1890 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 120 N did 600 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 470 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 20 N did 100 J of work. How many metres did the object move?
  19. 19.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ 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?
  22. 22.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?
  23. 23.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  24. 24.🏋️ A force of 40 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 7 m took 2590 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 340 N did 340 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 3800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 500 N did 1500 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 400 N did 2800 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 280 N pushes a cart 1 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 force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 440 N did 1320 J of work. How many metres did the object move?

Answer key

  1. no, work stays the same
  2. 2
  3. less effort
  4. 360
  5. 150
  6. 280
  7. 700
  8. 2970
  9. 8
  10. 350
  11. 5
  12. load ÷ effort
  13. 2
  14. 180
  15. 270
  16. 5
  17. 4700
  18. 5
  19. 950
  20. 200
  21. 130
  22. 450
  23. joule (J)
  24. 400
  25. 10
  26. 180
  27. 370
  28. 1160
  29. 1
  30. 950
  31. 3
  32. 7
  33. 4100
  34. 280
  35. 120
  36. 1200
  37. 750
  38. 320
  39. 6
  40. 3

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