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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 224 · 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 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 140 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  7. 7.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  9. 9.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
  10. 10.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  11. 11.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
  13. 13.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Pushing a crate 8 m took 1520 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 270 N did 2160 J of work. How many metres did the object move?
  27. 27.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 460 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  33. 33.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 120 N did 840 J of work. How many metres did the object move?
  36. 36.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 240
  2. 2820
  3. 1260
  4. 200
  5. 250
  6. less effort
  7. 800
  8. no, work stays the same
  9. 3200
  10. joule (J)
  11. 400
  12. 300
  13. 350
  14. 850
  15. 190
  16. 100
  17. 300
  18. 4
  19. 750
  20. 1
  21. 6
  22. 3870
  23. 700
  24. 5
  25. 370
  26. 8
  27. 50
  28. 3220
  29. 240
  30. 1350
  31. 30
  32. load ÷ effort
  33. 600
  34. 190
  35. 7
  36. 760
  37. 240
  38. 9
  39. 1290
  40. 870

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