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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 26 · 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 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 460 N did 1840 J of work. How many metres did the object move?
  5. 5.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  6. 6.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 5 m took 2050 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  12. 12.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  13. 13.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  14. 14.🏋️ A force of 90 N did 450 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 160 N did 1280 J of work. How many metres did the object move?
  23. 23.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  24. 24.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  25. 25.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 440 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 470 N did 3290 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 170 N pushes a cart 4 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 140 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 260 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 220 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?

Answer key

  1. 560
  2. 6
  3. 390
  4. 4
  5. through a distance
  6. 500
  7. 410
  8. 7
  9. 50
  10. 400
  11. joule (J)
  12. 460
  13. less effort
  14. 5
  15. 410
  16. 3
  17. 150
  18. 360
  19. 2
  20. 250
  21. 450
  22. 8
  23. no, work stays the same
  24. load ÷ effort
  25. 30
  26. 440
  27. 100
  28. 2
  29. 3
  30. 130
  31. 7
  32. 600
  33. 680
  34. 1260
  35. 2340
  36. 4
  37. 320
  38. 100
  39. 660
  40. 5

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