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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 428 · 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 6 m took 600 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 8 m took 1760 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 280 N did 560 J of work. How many metres did the object move?
  4. 4.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  5. 5.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  9. 9.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  10. 10.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 230 N did 2300 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 210 N pushes a cart 4 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 180 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 6 m took 1560 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  21. 21.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 460 N did 460 J of work. How many metres did the object move?
  23. 23.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 8 m took 4000 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 50 N did 400 J of work. How many metres did the object move?
  28. 28.🏋️ 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)
  29. 29.🏋️ 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?
  30. 30.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 160 N pushes a cart 4 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 70 N did 350 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 100
  2. 220
  3. 2
  4. through a distance
  5. 4
  6. 700
  7. 350
  8. load ÷ effort
  9. joule (J)
  10. 360
  11. 10
  12. 980
  13. 2
  14. 840
  15. 100
  16. 1440
  17. 30
  18. 260
  19. 3920
  20. less effort
  21. 600
  22. 1
  23. 650
  24. 500
  25. 10
  26. 8
  27. 8
  28. 650
  29. 150
  30. 240
  31. 340
  32. 2
  33. 640
  34. 230
  35. 5
  36. 10
  37. 2
  38. 650
  39. 8
  40. 950

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