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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 834 · 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.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  2. 2.🏋️ 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)
  3. 3.🏋️ Pushing a crate 6 m took 1860 J of work. What force was used, in newtons?
  4. 4.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  5. 5.🏋️ Pushing a crate 5 m took 1900 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  12. 12.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  16. 16.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 2 m took 640 J of work. What force was used, in newtons?
  25. 25.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 490 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ 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?
  28. 28.🏋️ A force of 290 N did 2030 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 230 N did 2070 J of work. How many metres did the object move?
  30. 30.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  31. 31.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  33. 33.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 110 N did 110 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 250 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 6 m took 1080 J of work. What force was used, in newtons?
  38. 38.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 5 m took 950 J of work. What force was used, in newtons?

Answer key

  1. joule (J)
  2. 350
  3. 310
  4. less effort
  5. 380
  6. 700
  7. 400
  8. 4
  9. 10
  10. 5
  11. through a distance
  12. 3
  13. 750
  14. 360
  15. 380
  16. 600
  17. 260
  18. 50
  19. 3
  20. 250
  21. 630
  22. 450
  23. 180
  24. 320
  25. 280
  26. 1470
  27. 200
  28. 7
  29. 9
  30. load ÷ effort
  31. 2
  32. 7
  33. 100
  34. 1080
  35. 1
  36. 750
  37. 180
  38. 120
  39. 30
  40. 190

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