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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 404 · 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 machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 500 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 420 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  6. 6.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  8. 8.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 5 m took 50 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
  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.🏋️ A force of 230 N did 1610 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 8 m took 1280 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  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 smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 140 N pushes a cart 6 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 5 m took 700 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ 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?
  30. 30.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  31. 31.🏋️ 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?
  32. 32.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  33. 33.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  34. 34.🏋️ 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?
  35. 35.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  37. 37.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 190 N did 950 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?

Answer key

  1. 4
  2. 1000
  3. 3780
  4. 550
  5. no, work stays the same
  6. 120
  7. 5
  8. 10
  9. 510
  10. 2
  11. 200
  12. 10
  13. 420
  14. 850
  15. 7
  16. 5
  17. 210
  18. 1170
  19. 160
  20. 5
  21. joule (J)
  22. 300
  23. 200
  24. 840
  25. 140
  26. 750
  27. 700
  28. 400
  29. 240
  30. 70
  31. 80
  32. 3
  33. less effort
  34. 110
  35. 70
  36. load ÷ effort
  37. 2240
  38. 5
  39. 2
  40. 3

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