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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 985 · 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 250 N did 1250 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  4. 4.🏋️ Pushing a crate 8 m took 2000 J of work. What force was used, in newtons?
  5. 5.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 140 N did 840 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ 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?
  11. 11.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 230 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 240 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 4 m took 640 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  18. 18.🏋️ A force of 360 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ 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)
  21. 21.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  22. 22.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  23. 23.🏋️ A force of 210 N did 1050 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 90 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 220 N pushes a cart 10 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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)
  27. 27.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
  28. 28.🏋️ 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?
  29. 29.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 8 m took 3200 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 10 N pushes a cart 4 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 5 m took 300 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 9 m took 2520 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort

Answer key

  1. 5
  2. 2820
  3. load ÷ effort
  4. 250
  5. 200
  6. 5
  7. 350
  8. 6
  9. 550
  10. 1000
  11. 6
  12. 360
  13. 230
  14. 1200
  15. 160
  16. 6
  17. no, work stays the same
  18. 360
  19. 80
  20. 350
  21. 400
  22. joule (J)
  23. 5
  24. 900
  25. 2200
  26. 750
  27. 10
  28. 130
  29. 2
  30. 330
  31. 50
  32. 400
  33. 40
  34. 2
  35. 60
  36. 500
  37. 280
  38. 250
  39. 560
  40. less effort

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