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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 346 · 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.🏋️ Pushing a crate 8 m took 320 J of work. What force was used, in newtons?
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  3. 3.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 150 N did 1050 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 430 N pushes a cart 8 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  8. 8.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  9. 9.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 110 N did 990 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 260 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  14. 14.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  15. 15.🏋️ 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?
  16. 16.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  17. 17.🏋️ A force of 440 N did 2200 J of work. How many metres did the object move?
  18. 18.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 500 N did 2000 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 10 m took 2800 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 5 m took 700 J of work. What force was used, in newtons?
  38. 38.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?

Answer key

  1. 40
  2. less effort
  3. 850
  4. 4
  5. 7
  6. 3440
  7. load ÷ effort
  8. no, work stays the same
  9. 180
  10. 9
  11. 10
  12. 1560
  13. through a distance
  14. 120
  15. 760
  16. joule (J)
  17. 5
  18. 150
  19. 540
  20. 6
  21. 5
  22. 800
  23. 4
  24. 30
  25. 200
  26. 1
  27. 1000
  28. 200
  29. 100
  30. 2
  31. 400
  32. 300
  33. 60
  34. 2
  35. 280
  36. 4
  37. 140
  38. 160
  39. 2
  40. 1820

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