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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 47 · 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 1760 J of work. What force was used, in newtons?
  2. 2.🏋️ A 15 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 smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ 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?
  5. 5.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ 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)
  7. 7.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 170 N did 1360 J of work. How many metres did the object move?
  9. 9.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Pushing a crate 1 m took 240 J of work. What force was used, in newtons?
  11. 11.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  12. 12.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  14. 14.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  16. 16.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  17. 17.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 90 N did 810 J of work. How many metres did the object move?
  19. 19.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 8 m took 3520 J of work. What force was used, in newtons?
  24. 24.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  26. 26.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  27. 27.🏋️ Pushing a crate 5 m took 2200 J of work. What force was used, in newtons?
  28. 28.🏋️ 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?
  29. 29.🏋️ 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?
  30. 30.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 200 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 130 N did 1300 J of work. How many metres did the object move?

Answer key

  1. 220
  2. 150
  3. 400
  4. 150
  5. 800
  6. 700
  7. 3
  8. 8
  9. 100
  10. 240
  11. no, work stays the same
  12. 460
  13. joule (J)
  14. 6
  15. 490
  16. load ÷ effort
  17. 6
  18. 9
  19. 600
  20. 3
  21. 250
  22. 3
  23. 440
  24. 4
  25. through a distance
  26. less effort
  27. 440
  28. 570
  29. 320
  30. 100
  31. 550
  32. 7
  33. 320
  34. 3
  35. 80
  36. 600
  37. 80
  38. 6
  39. 850
  40. 10

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