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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 765 · 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 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  3. 3.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  11. 11.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 50 N did 250 J of work. How many metres did the object move?
  13. 13.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  14. 14.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 50 N did 100 J of work. How many metres did the object move?
  17. 17.🏋️ 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?
  18. 18.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 4 m took 1160 J of work. What force was used, in newtons?
  20. 20.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
  26. 26.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  27. 27.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  28. 28.🏋️ 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?
  29. 29.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 270 N did 1890 J of work. How many metres did the object move?
  31. 31.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 270 N did 810 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 6 m took 1320 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 80
  2. load ÷ effort
  3. 350
  4. 6
  5. 2
  6. 3
  7. 1080
  8. 2
  9. 900
  10. joule (J)
  11. 60
  12. 5
  13. no, work stays the same
  14. 550
  15. 100
  16. 2
  17. 60
  18. 50
  19. 290
  20. 440
  21. 30
  22. 1380
  23. 750
  24. 2240
  25. through a distance
  26. less effort
  27. 320
  28. 400
  29. 190
  30. 7
  31. 380
  32. 8
  33. 3
  34. 700
  35. 240
  36. 5
  37. 3
  38. 220
  39. 5
  40. 400

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