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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 748 · 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 3 m took 270 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 110 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ 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?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  6. 6.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?
  7. 7.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  8. 8.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  9. 9.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  11. 11.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 60 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A 15 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 force of 230 N did 2300 J of work. How many metres did the object move?
  18. 18.🏋️ 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?
  19. 19.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 3 m took 660 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 160 N did 480 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ 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
  26. 26.🏋️ Pushing a crate 2 m took 80 J of work. What force was used, in newtons?
  27. 27.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 380 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 330 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ 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?
  36. 36.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 320 N did 960 J of work. How many metres did the object move?
  40. 40.🏋️ Pushing a crate 8 m took 1760 J of work. What force was used, in newtons?

Answer key

  1. 90
  2. 3
  3. 440
  4. 160
  5. load ÷ effort
  6. 80
  7. joule (J)
  8. less effort
  9. 150
  10. through a distance
  11. 2
  12. 900
  13. 400
  14. 300
  15. 6
  16. 450
  17. 10
  18. 240
  19. 4
  20. 220
  21. 3
  22. 40
  23. 3
  24. 750
  25. no, work stays the same
  26. 40
  27. 2
  28. 2660
  29. 8
  30. 700
  31. 150
  32. 60
  33. 3760
  34. 3300
  35. 540
  36. 350
  37. 7
  38. 30
  39. 3
  40. 220

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