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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 167 · 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 5 m took 700 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 340 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  8. 8.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  10. 10.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 70 N did 630 J of work. How many metres did the object move?
  15. 15.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 320 N did 960 J of work. How many metres did the object move?
  17. 17.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 60 N did 600 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 40 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 250 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 200 N pushes a cart 4 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  27. 27.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 110 N did 440 J of work. How many metres did the object move?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  31. 31.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  34. 34.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 430 N did 2150 J of work. How many metres did the object move?
  37. 37.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 30 N pushes a cart 7 m along the floor. How much work is done, in joules?

Answer key

  1. 140
  2. 340
  3. 140
  4. 1540
  5. 190
  6. 750
  7. joule (J)
  8. 450
  9. less effort
  10. 300
  11. 150
  12. 150
  13. 4
  14. 9
  15. 6
  16. 3
  17. 380
  18. 10
  19. 320
  20. 2500
  21. 5
  22. 300
  23. 5
  24. 120
  25. 800
  26. load ÷ effort
  27. 400
  28. 300
  29. 4
  30. no, work stays the same
  31. 110
  32. 920
  33. through a distance
  34. 200
  35. 120
  36. 5
  37. 550
  38. 6
  39. 120
  40. 210

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