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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 779 · 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 160 N did 1600 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 110 N pushes a cart 4 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  10. 10.🏋️ A force of 130 N did 1170 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 210 N pushes a cart 9 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
  14. 14.🏋️ A 3 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.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A 16 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 force of 100 N did 700 J of work. How many metres did the object move?
  19. 19.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  20. 20.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  21. 21.🏋️ Pushing a crate 3 m took 240 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 40 N did 320 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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?
  27. 27.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  28. 28.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Pushing a crate 5 m took 1300 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 290 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 80 N did 480 J of work. How many metres did the object move?
  39. 39.🏋️ 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?
  40. 40.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load

Answer key

  1. 10
  2. 1500
  3. 3
  4. 900
  5. 700
  6. 50
  7. 4
  8. 440
  9. through a distance
  10. 9
  11. 380
  12. 1890
  13. 2
  14. 120
  15. 950
  16. 5
  17. 320
  18. 7
  19. less effort
  20. joule (J)
  21. 80
  22. 8
  23. 2
  24. 380
  25. 60
  26. 260
  27. no, work stays the same
  28. 100
  29. 6
  30. 260
  31. 250
  32. 4
  33. 600
  34. 50
  35. 1
  36. 1450
  37. 300
  38. 6
  39. 600
  40. load ÷ effort

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