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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 795 · 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) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  2. 2.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 7 m took 490 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 260 N did 1820 J of work. How many metres did the object move?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 280 N did 2240 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  11. 11.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  13. 13.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  16. 16.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 4 m took 400 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  20. 20.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ 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?
  28. 28.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A force of 410 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 8 m took 1040 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 30 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 6 m took 2520 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 340 N pushes a cart 6 m along the floor. How much work is done, in joules?

Answer key

  1. no, work stays the same
  2. 4800
  3. 930
  4. 70
  5. 7
  6. 650
  7. 8
  8. 750
  9. 400
  10. load ÷ effort
  11. 480
  12. through a distance
  13. 6
  14. 50
  15. joule (J)
  16. 880
  17. 100
  18. 10
  19. 4
  20. 40
  21. 3
  22. 520
  23. 3
  24. 2
  25. 1
  26. 2
  27. 100
  28. 200
  29. 180
  30. 800
  31. 40
  32. 4
  33. 540
  34. 90
  35. 410
  36. 50
  37. 130
  38. 210
  39. 420
  40. 2040

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