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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 896 · 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 2 m took 800 J of work. What force was used, in newtons?
  2. 2.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  3. 3.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ 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)
  6. 6.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  9. 9.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  11. 11.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  13. 13.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 280 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ An 11 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 150 N did 450 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 350 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  20. 20.🏋️ A force of 150 N did 300 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
  23. 23.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  24. 24.🏋️ 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)
  25. 25.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 470 N pushes a cart 10 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 350 N did 1050 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 180 N did 900 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 220 N did 660 J of work. How many metres did the object move?
  34. 34.🏋️ 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?
  35. 35.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 400
  2. through a distance
  3. 4
  4. 150
  5. 750
  6. 110
  7. 4
  8. load ÷ effort
  9. 150
  10. less effort
  11. 800
  12. 120
  13. 60
  14. 1960
  15. 220
  16. 3
  17. 500
  18. 3150
  19. no, work stays the same
  20. 2
  21. 4
  22. 2
  23. joule (J)
  24. 150
  25. 30
  26. 4700
  27. 3
  28. 150
  29. 750
  30. 3
  31. 5
  32. 650
  33. 3
  34. 360
  35. 400
  36. 600
  37. 650
  38. 400
  39. 80
  40. 1000

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