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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 330 · 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 350 N did 3150 J of work. How many metres did the object move?
  2. 2.🏋️ 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?
  3. 3.🏋️ A force of 290 N did 290 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 250 N pushes a cart 5 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?
  8. 8.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  9. 9.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 9 m took 2610 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 8 m took 2720 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ 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?
  19. 19.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  20. 20.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 20 N did 180 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 370 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 200 N pushes a cart 2 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  29. 29.🏋️ Pushing a crate 5 m took 1150 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 430 N did 3870 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ 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?
  37. 37.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 6 m took 2100 J of work. What force was used, in newtons?

Answer key

  1. 9
  2. 120
  3. 1
  4. 2
  5. 1250
  6. 700
  7. 2
  8. through a distance
  9. 4
  10. 4
  11. 350
  12. 290
  13. 240
  14. 180
  15. 500
  16. 340
  17. 2
  18. 260
  19. less effort
  20. 10
  21. 9
  22. 2590
  23. 5
  24. 3
  25. 800
  26. 400
  27. 650
  28. joule (J)
  29. 230
  30. 190
  31. 6
  32. 570
  33. 2
  34. 9
  35. 2
  36. 600
  37. 20
  38. 2
  39. 30
  40. 350

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