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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 333 · 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 2520 J of work. What force was used, in newtons?
  2. 2.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 140 N did 1400 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 340 N did 1700 J of work. How many metres did the object move?
  5. 5.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 240 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 210 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  16. 16.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ Pushing a crate 7 m took 1260 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  19. 19.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  20. 20.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  21. 21.🏋️ 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?
  22. 22.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  25. 25.🏋️ 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?
  26. 26.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ 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?
  30. 30.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  32. 32.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  38. 38.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  39. 39.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  40. 40.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 420
  2. 900
  3. 10
  4. 5
  5. 240
  6. 110
  7. 10
  8. 3
  9. 3
  10. 240
  11. 350
  12. 2100
  13. 50
  14. 850
  15. 50
  16. 40
  17. 180
  18. 290
  19. through a distance
  20. 40
  21. 220
  22. 3
  23. 6
  24. load ÷ effort
  25. 200
  26. 4
  27. 3
  28. 6
  29. 650
  30. 420
  31. no, work stays the same
  32. 800
  33. 600
  34. 110
  35. 150
  36. 2
  37. joule (J)
  38. 130
  39. less effort
  40. 50

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