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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 582 · 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.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  2. 2.🏋️ A 16 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.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  6. 6.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  8. 8.🏋️ 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?
  9. 9.🏋️ 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)
  10. 10.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 410 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Pushing a crate 3 m took 1020 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 5 m took 650 J of work. What force was used, in newtons?
  18. 18.🏋️ A 6 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.🏋️ Pushing a crate 8 m took 2240 J of work. What force was used, in newtons?
  20. 20.🏋️ 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)
  21. 21.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 8 m took 1760 J of work. What force was used, in newtons?
  27. 27.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 3 m took 510 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 450 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 9 m took 3600 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 420 N did 2520 J of work. How many metres did the object move?
  36. 36.🏋️ A 5 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 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 220 N did 880 J of work. How many metres did the object move?
  39. 39.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?

Answer key

  1. joule (J)
  2. 160
  3. load ÷ effort
  4. less effort
  5. through a distance
  6. 160
  7. 9
  8. 40
  9. 700
  10. 320
  11. 6
  12. 100
  13. 1230
  14. 60
  15. 4
  16. 340
  17. 130
  18. 180
  19. 280
  20. 250
  21. 200
  22. 600
  23. 160
  24. 2
  25. 150
  26. 220
  27. 480
  28. 170
  29. 450
  30. 2700
  31. 400
  32. 2
  33. 4
  34. 550
  35. 6
  36. 250
  37. 160
  38. 4
  39. 30
  40. 2

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