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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 321 · 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.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  2. 2.🏋️ Pushing a crate 7 m took 980 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 430 N did 3440 J of work. How many metres did the object move?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  6. 6.🏋️ A force of 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A 9 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 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  15. 15.🏋️ A force of 50 N did 450 J of work. How many metres did the object move?
  16. 16.🏋️ 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?
  17. 17.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 7 m took 1680 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 400 N pushes a cart 9 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 350 N pushes a cart 6 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 15 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 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 430 N did 860 J of work. How many metres did the object move?
  35. 35.🏋️ A 17 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.🏋️ A force of 390 N pushes a cart 6 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 420 N pushes a cart 8 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 260 N pushes a cart 2 m along the floor. How much work is done, in joules?

Answer key

  1. joule (J)
  2. 140
  3. 1
  4. 8
  5. no, work stays the same
  6. 1560
  7. 1
  8. 1000
  9. 50
  10. 300
  11. 250
  12. 450
  13. 5
  14. load ÷ effort
  15. 9
  16. 240
  17. 450
  18. 50
  19. 60
  20. 3
  21. 5
  22. 400
  23. 240
  24. 3600
  25. 5
  26. 2100
  27. 300
  28. 1000
  29. 2240
  30. 400
  31. 120
  32. 200
  33. 2
  34. 2
  35. 170
  36. 2340
  37. 50
  38. 3360
  39. 150
  40. 520

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