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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 467 · 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 100 N did 300 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  5. 5.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 6 m took 1740 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 10 m took 700 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 4 m took 80 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 420 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  19. 19.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  20. 20.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  21. 21.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  24. 24.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  25. 25.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Pushing a crate 9 m took 3600 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 220 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  34. 34.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 6 m took 2220 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 3
  2. 140
  3. 60
  4. load ÷ effort
  5. 3
  6. 290
  7. 450
  8. 160
  9. 70
  10. 2
  11. 750
  12. 510
  13. 200
  14. 420
  15. 20
  16. 500
  17. 2100
  18. 50
  19. joule (J)
  20. through a distance
  21. 150
  22. 3
  23. 4
  24. no, work stays the same
  25. 1000
  26. 280
  27. 400
  28. 390
  29. 2310
  30. 290
  31. 50
  32. 220
  33. less effort
  34. 5
  35. 280
  36. 650
  37. 370
  38. 150
  39. 3
  40. 1260

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