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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 509 · 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.🏋️ 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
  2. 2.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  4. 4.🏋️ A force of 480 N pushes a cart 6 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 250 N did 1000 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 420 N did 2100 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  9. 9.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  10. 10.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  12. 12.🏋️ Pushing a crate 9 m took 4050 J of work. What force was used, in newtons?
  13. 13.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 490 N did 3920 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 490 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ 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?
  19. 19.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 350 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 20 N did 160 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 5 m took 1450 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 250 N did 2000 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 280 N did 2240 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  35. 35.🏋️ 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)
  36. 36.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  37. 37.🏋️ 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?
  38. 38.🏋️ A force of 410 N pushes a cart 4 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 3 m took 360 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 100 N did 1000 J of work. How many metres did the object move?

Answer key

  1. no, work stays the same
  2. 140
  3. load ÷ effort
  4. 2880
  5. 450
  6. 4
  7. 5
  8. 320
  9. less effort
  10. joule (J)
  11. through a distance
  12. 450
  13. 760
  14. 8
  15. 1680
  16. 160
  17. 4410
  18. 30
  19. 240
  20. 3150
  21. 3
  22. 8
  23. 2
  24. 290
  25. 310
  26. 3
  27. 800
  28. 4
  29. 8
  30. 8
  31. 2
  32. 1480
  33. 90
  34. 3
  35. 250
  36. 50
  37. 320
  38. 1640
  39. 120
  40. 10

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