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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 539 · 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 8 m took 2960 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  4. 4.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  5. 5.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  7. 7.🏋️ A force of 160 N did 320 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 10 N did 60 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 70 N did 140 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 7 m took 2030 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  20. 20.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A 6 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 machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 70 N did 350 J of work. How many metres did the object move?
  27. 27.🏋️ 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?
  28. 28.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 430 N pushes a cart 5 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  35. 35.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 5 m took 700 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 370 N did 3700 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 6 m took 1560 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 10 m took 3300 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?

Answer key

  1. no, work stays the same
  2. 370
  3. 340
  4. joule (J)
  5. 3
  6. through a distance
  7. 2
  8. 950
  9. 950
  10. 4
  11. 3
  12. 6
  13. 6
  14. 4
  15. 2
  16. 290
  17. 4500
  18. 2
  19. less effort
  20. 300
  21. 120
  22. 4
  23. 140
  24. 330
  25. 180
  26. 5
  27. 160
  28. 140
  29. 6
  30. 2150
  31. 10
  32. 20
  33. 250
  34. load ÷ effort
  35. 800
  36. 140
  37. 10
  38. 260
  39. 330
  40. 240

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